DIY Automotive Guides
Learn to work on your car with step-by-step guides for maintenance, repairs, and modifications
Honda Civic EK 5-Lug Conversion Using CRV Parts
Converting your Honda Civic EK from 4x100 to 5x114.3 bolt pattern opens up a world of wheel options and allows you to use larger brake setups. This guide covers the popular CRV conversion method, which is one of the most cost-effective ways to achieve a 5-lug setup.
Installing Coilovers for Lowering Your Car
Coilovers allow you to lower your car while maintaining adjustability and ride quality. This advanced modification requires mechanical knowledge and proper tools. Consider professional installation if you're not confident in your abilities.
Replacing Front Brake Pads
Worn brake pads can compromise your vehicle's stopping power and safety. This guide covers the process of replacing front brake pads, a common maintenance task that can save you money when done yourself.
How to Change Your Engine Oil
Regular oil changes are essential for maintaining your engine's health and longevity. This guide will walk you through the process of changing your engine oil and filter, a fundamental maintenance task every car owner should know.
KW ST Coilover Installation on the Acura TSX, with Bushing Clocking
This guide covers installing height-adjustable coilovers (KW ST Speedtech) on an Acura TSX Sport Wagon; the procedure applies equally to the related TSX/Accord chassis. Beyond the basic remove-and-replace work, it details bushing clocking: re-torquing the rubber control-arm bushings at the new ride height. This step is usually skipped, but tightening bushings with the suspension at full droop forces them to twist far beyond their working range once the car settles, which damages them and is costly to fix. Bushings should always be clocked to the current ride height (within about 0.5 inch). The result on the original car was a firm but well-controlled ride with much flatter cornering than stock, with front spring rates (12 kg/mm) that appear chosen to also accommodate nose-heavy V6 variants. Adapted from a community writeup by B serious on Honda-Tech (https://honda-tech.com/forums/suspension-brakes-54/coilover-diy-review-pics-kw-sts-tsx-wagon-3250600/), including corrections from the follow-up discussion.
Honda Civic (1992-2000) Front Wheel Bearing Replacement
This guide covers replacing a front wheel bearing on 1992-2000 Honda Civics (EG and EK chassis; the same layout applies to closely related models such as the Del Sol and Acura 1.6 EL). A worn front bearing announces itself as a droning or growling noise that changes with speed and cornering load. The bearing is pressed into the steering knuckle with the hub pressed through it, so the knuckle must come off the car and the old bearing and hub must be pressed out and the new parts pressed in - either with a hydraulic press (many shops will do the pressing for $30-50 if you bring them the bare knuckle) or manually with hammers and a threaded-rod puller setup as described below. Adapted from a community writeup by black magic on Honda-Tech (https://honda-tech.com/forums/suspension-brakes-54/diy-92-00-civic-wheel-bearing-replacement-2833700/), including corrections from the follow-up discussion.
Civic/Integra Rear Trailing Arm Bushing Replacement (On-Car Method)
The rear trailing arm is the member the rear suspension pivots on, and its large front bushing controls how the rear axle behaves under cornering load. Worn (cracked) rubber bushings add play, and aftermarket polyurethane bushings are known to bind: the writeup's author traced an abrupt rear-end step-out at track speeds directly to binding ES poly bushings, and replacing them with Mugen hard rubber bushings transformed the car's rear stability. This procedure replaces the trailing arm bushings with the arms still on the car using a dedicated puller tool, avoiding removal of the trailing arms and brakes or a trip to a machine shop. Two measurements taken before removal — the bushing's rotational position (clocking) and its installed depth — are critical to bushing life, so do not skip them. The whole job took the original author about an hour. Adapted from a community writeup by rmcdaniels on Honda-Tech (https://honda-tech.com/forums/suspension-brakes-54/how-quick-easy-civic-integra-trailing-arm-bushing-replacement-also-es-poly-vs-mugen-1589298/), including corrections from the follow-up discussion.
Chipping Honda OBD0 and OBD1 ECUs for Programmable Tuning
Socketing (chipping) a Honda ECU replaces the factory ROM with a 28-pin socket and a programmable EPROM, letting you run custom fuel and ignition maps, raise limiters, and datalog through free tools such as BRE and Turboedit (OBD0) or Crome, Uberdata, and Hondata (OBD1). This guide covers the classic chippable ECUs: OBD0 PR3 and PW0 (difficulty 3/10), OBD1 P05, P06, P08, P28, P30, P74, P75, and OBD1 PR3/PR4 (difficulty 4/10 if the latch is already on the board, 8/10 if you must add it), plus notes for the City Turbo T2 ECU (code 108, difficulty 6/10; a T1 should also work using the T2 ROM image). Important limits from the author's follow-up answers: automatic-transmission OBD1 ECUs cannot be chipped, and neither can ECUs made after 1995 (e.g. a P72 must be a manual, pre-96 unit). This is precision soldering on an irreplaceable board - damaged traces can total the ECU - so work carefully. Adapted from a community writeup by bmgjet on OzHonda (https://ozhonda.com/forum/showthread.php?162731-How-To-Chipping-Honda-ECU-s), including corrections from the follow-up discussion.
Honda Civic (EG) Fuel Pump Replacement
This guide replaces the in-tank fuel pump on an EG Honda Civic; the pump is accessed under the rear seat, and the same approach applies to most Hondas of the era. Common causes of fuel pump failure include prolonged use of poor-quality fuel, habitually running the tank below reserve (which lets the pump run dry), bad electrical connections, and plain old age. Failure symptoms and diagnosis aside, the mechanical swap is straightforward: drop the rear seat, open the access cover, disconnect two fuel lines and one plug, lift the pump cradle out, and transfer the new pump onto it. Note one platform difference reported in the discussion: some 1994+ Civics use a yellow plastic clip connector on the fuel feed line instead of the 17mm banjo bolt shown here (though the source car was a 1995 EG with the banjo bolt — check which fitting your car has). Adapted from a community writeup by tiksie on OzHonda (https://ozhonda.com/forum/showthread.php?164462-How-to-change-a-Fuel-Pump-on-a-EG-Civic-(Can-be-applied-to-most-other-Honda-s)), including corrections from the follow-up discussion.
Honda B-Series Harmonic Damper Inspection and Fluidampr Upgrade
The harmonic damper (crank pulley/balancer) on the crankshaft snout does more than drive the water pump, alternator and A/C compressor: it counters torsional twist and resonance vibration in the crankshaft. The OEM elastomer damper is tuned to a narrow frequency range for the factory setup; once forged internals, cams, forced induction or nitrous alter the engine's harmonics, the stock damper protects less and robs horsepower and torque, and its rubber bond degrades with heat and climate cycling - a failure mode the factory service manual never schedules for inspection. Uncontrolled resonance can wear or destroy the crankshaft, bearings, oil pump and even the valvetrain. This guide covers inspecting the stock damper, choosing a replacement for a modified B-series (which is internally balanced - the stock damper carries no counterweights), installing a Fluidampr viscous unit, and verifying the result. The author fitted one to a forced-induction B-series rebuilt from the ground up and measured a 36.4 dB peak noise reduction at idle. Adapted from a community writeup by jetspeedz on Honda-Tech (https://honda-tech.com/forums/forced-induction-16/fluidampr-jetspeedzs-personal-impressions-review-how-install-write-up-3329855/), including corrections from the follow-up discussion.
Hardwiring a High-Flow Fuel Pump with a Dedicated Relay (Honda/Acura)
High-flow aftermarket fuel pumps such as the Walbro 450 LPH draw far more current than the factory fuel pump circuit was designed to carry. This procedure hardwires the pump through a dedicated 40 A relay fed directly from the battery with 10 AWG cable, using the original fuel pump power and ground wires only as low-current relay trigger signals. The result is full battery voltage at the pump and reduced load on the factory harness and main relay. The writeup was performed on a 1999 Acura Integra GSR (DC2) ahead of a Walbro 450 LPH install, and the same approach applies to other Honda and Acura models of the era with model-specific wire colors. Every crimped joint is also soldered and double-layer heat shrunk for vibration resistance. Adapted from a community writeup by Destructive- on Honda-Tech (https://honda-tech.com/forums/forced-induction-16/official-how-hardwire-fuel-pump-3279999/), including corrections from the follow-up discussion.
Honda DOHC Non-VTEC Rocker Cover Gasket and Cam Plug Reseal
Oil weeping down the upper block, grime around the cam cover, or unexplained oil consumption on a Honda engine past 100,000 km is very often a failed rocker cover gasket or camshaft end plug (cam plug). This procedure reseals every upper gasket and O-ring on the head: the rocker cover gasket, the spark plug tube O-rings, and the notorious rubber cam plug behind the exhaust camshaft end holder. A leaking cam plug can contribute to significant oil loss over time, so a full reseal is the proper fix rather than smearing sealant on the outside. The writeup was performed on a D16A8 and applies to Honda DOHC non-VTEC engines (D16A8, B18A, B18B); DOHC VTEC heads are about 95 percent the same process except the rail above the camshafts must also be unbolted before the cam end holder can come off, and SOHC rocker covers follow almost exactly the same principle. Note the forum title says "upper head gasket" but, as corrected in the replies, the part being replaced is the rocker (valve) cover gasket - the actual head gasket is not disturbed. Work on a cold engine, preferably after sitting overnight. Adapted from a community writeup by bennjamin on OzHonda (https://ozhonda.com/forum/showthread.php?22561-DIY-Upper-head-gaskets-replacement-reseal-(non-vtec-DOHC-engines)), including corrections from the follow-up discussion.
Honda Throttle Body Cleaning (Carbon and Oil Deposit Removal)
Carbon and oil buildup inside the throttle body is a common cause of idle problems on older Honda engines: stalling at idle (especially with the A/C on), idle speed sitting below specification, intermittent rev hunting, and a small loss of overall power and smoothness. This procedure removes those contaminants by spraying and scrubbing the throttle body bore and plate with dedicated throttle body cleaner. The demonstration engine is a D16A8 (ZC) non-VTEC, but the process applies to most distributor-era Honda engines. Note that if the engine idles too high (2000+ RPM cold, 1500+ RPM warm) or idles erratically, the fault is more likely carbon in the IACV screen or a backed-out FITV plug (D-series engines) — those are separate jobs. Work outdoors with the engine off, handbrake applied, and the transmission in neutral. Adapted from a community writeup by EuroDude on OzHonda (https://ozhonda.com/forum/showthread.php?35488-DIY-Throttle-Body-Cleaning), including corrections from the follow-up discussion.
Budget Full-Color-Change Respray Using Marine Topside Paint (Roll or Spray)
This is the well-known 'budget paint job' refined with single-stage marine topside paint instead of hardware-store enamel, which produces a much glossier, close-to-OEM finish. Marine topside paint is UV-stable and durable (it is formulated to survive on boats), costs around $30 per gallon versus $150-300 for automotive single-stage, and can be applied either with a 4-inch roller straight from the can or through a cheap HVLP gun thinned about 10% with mineral spirits. The documented project was a full color change (blue to gloss white) on a 14-year-old Civic - exterior, interior, engine bay, jambs and brackets - completed by a first-timer over about three months of weekends for roughly $450, most of which was wasted spray cans; done with the spray gun from the start, the total would have been well under $150. Rolling and spraying give the same end result, but rolling roughly doubles or triples the labor because of wetsanding between coats. This suits any Honda (or any car) needing a full respray on a tight budget. Adapted from a community writeup by fventura03 on Honda-Tech (https://honda-tech.com/forums/paint-body-84/my-%2450-more-like-%24452-63-paint-job-writeup-thread-tons-pictures-1857355/), including corrections from the follow-up discussion.
Honda Coolant Change and Bleed (EG/EK Civic, DC2 Integra)
This procedure drains, refills, and bleeds the cooling system on 1990s Honda Civic (EG/EK) and Integra (DC2) models, and follows the Honda service manual method. Honda recommends flushing the coolant roughly every 40,000 km (many dealers do it every 20,000 km); old coolant loses its corrosion inhibitors and turns visibly brown against fresh fluid. The job needs only two drain points, a 12mm bleed bolt, and about 4-5 L of coolant, and it is one of the easiest pieces of preventive maintenance you can do on these cars. Adapted from a community writeup by wynode on OzHonda (https://ozhonda.com/forum/showthread.php?11430-DIY-Coolant-change-(EG-EK-DC2)), including corrections from the follow-up discussion.
JDM B18C (Integra Type R) Engine Swap into an EG Civic
This guide covers transplanting a JDM B18C engine from an Integra Type R (DC2) into a 1992-1995 EG Civic. The B18C is a 1.8 L DOHC VTEC engine, and with the complete set of Integra Type R ancillaries (mounts, power steering hose, shift linkage and driveshafts) it installs into the EG engine bay with essentially no fabrication: every mechanical connection lines up with the factory Civic hardware. The work that requires real care is the engine management wiring, since the OBD2-era Type R ECU must be joined to the Civic's loom wire by wire, with five additional circuits run to the engine bay. Buying a front cut (the complete front half of a donor car) is strongly recommended because it supplies the engine, gearbox, ECU, loom, mounts, accelerator cable, power steering hose and driveshafts in one purchase. The conversion described here was completed in two days of work. Note that the JDM Type R and the JDM SiR/VTi-R engines are both stamped "B18C" with no suffix; the Type R unit is identified by its S80 LSD gearbox, its intake manifold and its rocker cover color (the B18C5 is the US Type R engine and the B18C7 the Australian one). Adapted from a community writeup by ECU-MAN on OzHonda (https://ozhonda.com/forum/showthread.php?30312-DIY-JDM-B18C-ITR-Engine-Install-in-EG-Civic), including corrections from the follow-up discussion.
Honda Main PGM-FI Relay Repair - Solder Reflow for No-Start and Stalling Issues
The main PGM-FI relay is one of the most common causes of intermittent no-start and stalling problems on 1980s-1990s Hondas. The classic symptoms: the car starts fine but stalls after some driving and will not restart (or restarts and stalls again), the fuel pump does not prime for a couple of seconds when the ignition is first switched on, and low or no fuel pressure. Failures are often worse on hot days and the car may start again after sitting for a few hours. The cause is usually dry (cracked) solder joints inside the relay from years of heat cycling, and the fix is a five-minute solder reflow rather than a replacement part. Note the relay can still prime the pump intermittently even when faulty, and other components (ignition coil, ICM, ignition switch) can mimic these symptoms - but since the relay is so easy to fix, it is the logical place to start. Applies broadly to Civic, CRX, Integra, Accord, Prelude, Del Sol, and CR-V of the era; only the relay's location varies by model. Adapted from a community writeup by ECU-MAN on OzHonda (https://ozhonda.com/forum/showthread.php?31796-DIY-Main-PGMFI-Relay-repair), including corrections from the follow-up discussion.
Honda Brake Master Cylinder Rebuild
A brake pedal that slowly creeps to the floor under steady pressure — often worse in hot weather — is the classic symptom of a worn brake master cylinder. Bleeding may help temporarily, but if the symptom returns intermittently, the master cylinder is bypassing internally. Nine times out of ten the cause is worn seals on the two pistons, which a rebuild kit fixes for roughly a third of the price of a new master cylinder (a kit runs about $90-100 against $250-280 for a new unit); only a badly scored bore requires outright replacement. This procedure was documented on a BB2 Prelude VTi-R but the concept applies to most Honda master cylinders of the era, and the same method works for the clutch master cylinder. The hands-on work takes around 30 minutes — take your time and do not rush. Note that rebuild kit availability varies by model: some dealers sell the pistons and seals only as separate items. Adapted from a community writeup by ECU-MAN on OzHonda (https://ozhonda.com/forum/showthread.php?34893-DIY-Brake-Master-Cylinder-rebuild), including corrections from the follow-up discussion.
S2000 Steering Wheel Install into a 5th Gen Prelude (SRS Airbag Wheel Swap)
This guide covers fitting a JDM S2000 airbag steering wheel to a 1997 5th generation Prelude with ATTS, including rewiring the cruise control buttons and adding the sensor notch the ATTS system requires. The same approach works for other compatible Honda SRS wheels and chassis - confirmed combinations are a CTR or S2000 wheel onto an EM Civic, EJ Civic or 5th gen Prelude - but it does not apply to cars where the wheel's airbag inflator carries the SRS ECU on its back (4th gen Prelude, EG Civic and EK Civic); those wheels are not interchangeable. Honda SRS systems demand strict handling discipline throughout, and because no crash testing is possible for a mixed-model airbag installation, you fit a different model's SRS wheel entirely at your own risk. Adapted from a community writeup by ECU-MAN on OzHonda (https://ozhonda.com/forum/showthread.php?42522-DIY-S2000-Stearing-wheel-install-into-97-ATTS-Prelude), including corrections from the follow-up discussion.
Civic Type R 5-Lug Brake and Suspension Conversion for the 1996-2000 Civic (EK)
This conversion fits the complete Civic Type R (EK9) 5-lug hub, brake, and suspension package to a USDM 1996-2000 Civic (EK), converting a drum-braked 4-lug car to 5-lug hubs with four-wheel disc brakes and, optionally, CTR springs, dampers, and front sway bar. The parts are a near-direct fit: the CTR e-brake cables hook up without modification, the stock front brake lines work when rerouted, and the stock rear lower control arms can be reused. Expect the full package (with wheels, tires, and lug nuts) to cost on the order of $2,100 in used parts, so treat it as a braking and track-day upgrade rather than a cosmetic one. This is not an exhaustive teardown manual; it assumes you can handle basic hub and suspension disassembly and focuses on the conversion-specific details and part interchange. Adapted from a community writeup by Aquafina on Honda-Tech (https://honda-tech.com/forums/suspension-brakes-54/diy-%5Bhow-%5D-civic-type-r-brakes-suspension-onto-96-00-civic-ctr-5-lug-1112213/), including corrections from the follow-up discussion.
Installing an S2000 Engine Start Button in a 5th-Gen Honda Prelude
This procedure retrofits a genuine Honda S2000 engine start button into the cigarette-lighter position of a 5th-generation (1997) Honda Prelude. The button is wired through a new automotive relay spliced into the factory starter circuit, so the car starts exactly like an S2000: insert the key, turn the ignition to ON, then press and hold the button until the engine fires. The key barrel, steering lock and factory immobilizer are all retained, and you can optionally keep or disable the key's START position. The same relay schematic works on any Honda (a follow-up post confirms a JDM Civic Type R button bolts straight into a Civic FD panel with no modification), but the wire colors described here are specific to the 5th-gen Prelude - on any other car, verify every wire with a test light before splicing. Have your stereo security code on hand before starting, because the stereo must be removed. Adapted from a community writeup by ECU-MAN on OzHonda (https://ozhonda.com/forum/showthread.php?42680-DIY-S2000-start-button-into-97-Prelude), including corrections from the follow-up discussion.
Turbocharging a Naturally Aspirated Honda: Full Turbo Kit Installation
This is a complete walkthrough of converting a naturally aspirated Honda to turbocharging, based on a documented full kit install on an OBD1 Civic/Integra-family engine. It covers removal of the factory intake and exhaust manifold, fitting the turbo manifold, turbocharger and downpipe, plumbing the oil feed and drain, mounting a front-mount intercooler, upgrading the in-tank fuel pump and injectors, adding an injector resistor box for low-impedance injectors, installing a vacuum manifold and boost gauge, and fitting a Hondata-modified ECU. Expect a difficulty of 7-9 out of 10 by import-tuning standards (a full engine build being 10) and allow at least a week of working time so unplanned problems do not leave the car stranded. Adapted from a community writeup by jimmeh on OzHonda (https://ozhonda.com/forum/showthread.php?43515-How-To-Turbocharge-Your-Honda), including corrections from the follow-up discussion.
Lowering Spring and Shock Installation for the 1998-2002 Honda Accord (CG/CK)
This guide covers installing a lowering spring and sport damper combination (H&R Sport springs on Koni Sport shocks) into the 1998-2002 CG/CK-series Honda Accord. It includes the full front strut and rear shock replacement procedure, all factory torque settings used, the interior disassembly required to reach the rear upper mounts, and the headlight re-aim that a lowered ride height makes necessary. On the original car this combination lowered the vehicle approximately 2.2 inches at the front and 1.9 inches at the rear. Check that the resulting ride height remains road-legal in your region before committing, and finish with a wheel alignment. Adapted from a community writeup by SiReal on OzHonda (https://ozhonda.com/forum/showthread.php?45435-DIY-Spring-Shock-combo-into-1998-2002-CG-CK-series-Honda-Accord), including corrections from the follow-up discussion.
EK Civic Type R-Style Headlight Blackout (No-Oven Method)
Genuine Civic Type R headlights command a steep premium - around 300 dollars at the time of writing, with genuine EK9 lights later fetching 900 dollars or more - but the CTR look is essentially a standard EK headlight with a dark inner housing. This guide converts standard EK Civic headlights into Type R-style units by opening the headlight, painting the chrome inner housing, and resealing it. It deliberately avoids the common oven method: the author melted a light on a previous oven attempt, and a space heater softens the factory silicone without getting hot enough to deform the plastic. The same process works on EG and ED Civic headlights. Note the differences from genuine parts: the real CTR housing is a reflective grey/gunmetal tint rather than black, and Honda did not paint the indicator (blinker) housing - the author painted his black for maximum contrast against a white car. Adapted from a community writeup by EK4R on OzHonda (https://ozhonda.com/forum/showthread.php?45494-DIY-CTR-Headlight-for-EK-(without-oven)), including corrections from the follow-up discussion.
B16A Engine Swap into a Second-Generation Honda CRX (ED9)
This conversion installs a B16A DOHC VTEC engine and Y1 cable-clutch gearbox from an EF9 Civic SiR front cut into a 1988 second-generation Honda CRX (ED9), replacing the factory D16A8. The author went into the job without prior experience of this specific swap and documented everything as it came, so the writeup settles several long-standing questions about what actually fits. The engine requires custom mounts (Avid mounts were used), DA-series driveshafts and a mid shaft, the EF8/EF9 power steering high-pressure hose, shift linkage, clutch and accelerator cables, and substantial wiring work: a PGM-FI engine-bay connector is transplanted from the donor EF9 cabin loom into the CRX loom, and new shielded signal wires are run to the PW0 OBD0 ECU. The complete job, including stripping the donor front cut, took the author four 6-hour days working alone. Adapted from a community writeup by ECU-MAN on OzHonda (https://ozhonda.com/forum/showthread.php?46374-DIY-ED9-(-88-gen2-CRX-)-B16A-Engine-transplant), including corrections from the follow-up discussion.
Honda Prelude (1992-1996) 4WS ECU Repair - Dry Solder Joint Reflow
The four-wheel steering (4WS) ECU in the 1992-1996 Honda Prelude (BB series) is a known failure point: high current through the relay and driver joints, combined with heat cycling, causes dry (cracked) solder joints over time. Symptoms include the 4WS warning light coming on intermittently while driving, on hot days, over bumps, or staying on permanently after the system previously worked. This repair pulls fault codes to confirm the ECU is the likely culprit, then removes the unit from behind the rear left seat, opens it, and reflows the suspect solder joints - typically fixing the system for the cost of a little solder. Codes in the 60s range are the common signature of this fault. This procedure will not fix faulty steering angle sensors, a faulty rear actuator (motor), misaligned sensors, or faulty wheel speed sensors, but if you are unsure why your 4WS is not working, it costs nothing to eliminate this common ECU problem first. The author reports the job takes about 45 minutes all up, but advises not to rush it. Adapted from a community writeup by ECU-MAN on OzHonda (https://ozhonda.com/forum/showthread.php?51150-DIY-92-96-Prelude-4WS-ECU-Repair), including corrections from the follow-up discussion.
OEM Acura TL HID (D2R) Conversion for JDM H4H Headlamps
JDM one-piece headlamps for the EG Civic and DA Integra use the H4H bulb, a fitment that was produced only briefly, so practically no aftermarket HID kit exists for it and even replacement halogen H4H bulbs are hard to buy outside Japan. This conversion installs the factory OEM HID system from a 1999 Acura TL - Matsushita ballasts with D2R bulbs - into any JDM H4H headlamp. The D2R bulb is the best-fitting HID option for the H4H socket: its base width is almost identical, and the filament (arc) placement matches the H4H so the beam placement stays essentially stock, with the bulb sitting only about 1/8 inch further back because of the large HID plug. Being OEM, D2R/D2S bulbs are cheap, easy to source, and not brand-specific, and an unmodified factory kit is far more reliable than a rebased aftermarket kit. Be aware of the trade-offs discussed in the thread: the JDM housing has no glare shield, so there is no distinct cutoff line, the fluted lens produces flare, and the dual-filament high beam function is lost entirely. Adapted from a community writeup by DjGuamstyles on Honda-Tech (https://honda-tech.com/forums/lighting-107/how-acura-tl-hids-into-any-jdm-h4h-headlamp-2114909/), including corrections from the follow-up discussion.
Acura TSX HID Projector Retrofit into EG Civic Headlights
This retrofit mounts genuine Acura TSX OEM HID projectors inside the stock 1992-1995 Honda Civic (EG) headlight housings, paired with D2S bulbs and HID ballasts. Compared with the stock halogens or a plug-and-play HID kit dropped into the halogen reflector, a true OEM projector retrofit gives far greater light output, better night visibility, and a high-end look, because the projector's optics - including the cutoff shield, which on these newer TSX units forms part of the projector's front-half molding - control the beam. The original author retained the OEM fluted glass lens; several experienced repliers cautioned that a fluted lens can scatter a projector beam and soften the cutoff, so consider clear lenses if a razor-sharp cutoff matters to you. Keep a spare set of headlights if the car is your daily driver, since the housings are cut and modified permanently. Adapted from a community writeup by ejoner on Honda-Tech (https://honda-tech.com/forums/lighting-107/diy-eg-tsx-hid-projector-retrofit-2193541/), including corrections from the follow-up discussion.
Honda OBD0 to OBD1 ECU and Distributor Conversion
This conversion upgrades an OBD0 Honda to OBD1 engine management so it can run an OBD1 ECU, giving far more flexibility for tuning and engine-management options (for example chipped ECUs running Crome). The documented car is an OBD0 EF8 CR-X converted with a P75 ECU and an OBD1 distributor from an Integra VTi-R, using a Boomslang Fabrications OBD0-to-OBD1 jumper harness. Because the EF8 is already a VTEC car, only the VTEC solenoid and oxygen sensor wires needed connecting at the ECU end; the procedure also covers the extra engine-bay wiring needed when fitting a VTEC engine to a chassis that never came with VTEC. The distributor swap is handled by re-pinning the OBD1 distributor's wires into the original OBD0 connectors, so no donor loom plugs are required. The method applies to other harness brands, and the distributor section applies regardless of harness. Adapted from a community writeup by ECU-MAN on OzHonda (https://ozhonda.com/forum/showthread.php?64865-OBDO-to-OBDI-convertion), including corrections from the follow-up discussion.
Koni Sport Shocks and Ground Control Coilover Sleeve Install (Honda Civic)
This procedure fits Koni Sport dampers with Ground Control coilover sleeves and Eibach springs to a Honda Civic - a proven, budget-friendly performance combination that lets you choose spring rates and adjust ride height, and the same layout applies to EG/EK Civics and DC2 Integras with double-wishbone suspension. Because the kit reuses the factory top hats, bump stops, and hardware, most of the work is careful disassembly and reassembly of the strut units in the right order. The rear is covered first, then the front, which differs mainly in the shock fork attachment to the lower control arm. Koni Sports handle spring rates up to around 600 lb (10.7 kg/mm); the author started at 400 lb front / 300 lb rear for street comfort, getting additional roll stiffness from sway bars instead. Torque figures are not repeated here - take them from a Helms or equivalent manual for your chassis, and always final-torque suspension bolts at static ride height. Adapted from a community writeup by Muzz on OzHonda (https://ozhonda.com/forum/showthread.php?70834-DIY-Koni-amp-Ground-Control-Civic-Install), including corrections from the follow-up discussion.
Honda Accord Euro (CL9) Center Console and Switch Backlighting LED Color Conversion
This conversion replaces the stock green backlighting of the Honda Accord Euro (CL9, 2003-2005 Australian-market Accord Euro) interior controls with LEDs in the colors of your choice - the original build used white with red accents. It covers the entire audio/climate center console, VSA and sunroof switches, seat-heater switches, hazard switch, driver's door window/mirror/lock control panel, and the passenger and rear window switches. The factory illumination uses soldered-in surface-mount lamps, so this is a desolder-and-replace job on multiple PCBs requiring fine SMD soldering skills, correct resistor selection, and careful attention to LED polarity. Beyond the color change, LEDs (rated around 100,000 hours) are a permanent fix for the CL9's notoriously hard-to-replace blown console backlight globes. Adapted from a community writeup by EUR003act on OzHonda (https://ozhonda.com/forum/showthread.php?71765-DIY-Accord-Euro-Centre-Console-Lighting-Colour-Modification), including corrections from the follow-up discussion.
Honda Manual Transmission Removal and Input Shaft Bearing Replacement
This procedure removes the manual transmission from a Honda Civic (D-series shown; the B-series gearbox is essentially the same) and replaces the input shaft bearing (ISB), the usual culprit behind gearbox whine that changes with clutch engagement. The first half - getting the gearbox out - is identical to what you would do for a clutch, flywheel, release bearing or rear main seal job, so it doubles as a clutch replacement guide. Everything is done on jack stands with hand tools; the only genuinely fiddly parts are popping the lower ball joints, the shift linkage spring pin, and the countershaft snap ring inside the case. While the box is apart, inspect and replace any other worn bearings and all the oil seals so you never have to do this twice. Adapted from a community writeup by wynode on OzHonda (https://ozhonda.com/forum/showthread.php?12789-DIY-Tranny-removal-and-Input-Shaft-Bearing-change), including corrections from the follow-up discussion.
Honda PGM-FI Fault Code Reading and ECU Reset (OBD0/OBD1/OBD2)
This procedure reads stored fault codes from the PGM-FI (Programmed Fuel Injection) engine control unit on Honda vehicles, letting you diagnose fuel injection and sensor faults without a scan tool. It covers AUDM code definitions, which also apply to JDM and USDM cars, and the codes are the same across OBD0, OBD1, OBD2a and OBD2b generations. On OBD0 cars the codes are read from a red LED visible through a window on the ECU itself; on OBD1 and OBD2 cars you bridge the SCS (service check) connector and read the codes as flashes of the yellow MIL (Malfunction Indicator Lamp, the check-engine light) on the dash. The procedure also covers resetting the ECU after repairs. Note the ECU can only report faults it monitors: problems with ignition leads, the coil, a blocked fuel or air filter, the main relay or the fuel pump will not set a code. Adapted from a community writeup by ECU-MAN on OzHonda (https://ozhonda.com/forum/showthread.php?67113-DIY-PGMFI-Diagnostics-Codes), including corrections from the follow-up discussion.
DC2 Integra Dashboard Swap into an EG Civic
This conversion replaces the 1992-1995 EG Civic dashboard with the more modern dashboard from a DC2 Integra, along with the matching heater box, fusebox, center console, kick panels and carpet. It is primarily a wiring-and-fabrication job: the DC2 dash harness must be re-pinned into the EG's connector shells (mapped with a multimeter), the dash mounts modified with an angle grinder and custom sheet-metal brackets, and the dash, steering column support beam and door trims trimmed for fitment. Use parts from the same OBD generation throughout - a 1994-1997 DC2 is OBD1, matching an OBD1 EG main harness, and mixing generations invites wiring differences. This guide assumes the EG dash and heater unit are already removed. Total cost depends entirely on parts sourcing; the documented build came to roughly $2,500 including seats. Adapted from a community writeup by Paul1985 on OzHonda (https://ozhonda.com/forum/showthread.php?103308-DIY-DC2-Dash-into-EG), including corrections from the follow-up discussion.
H22A Prelude Engine Swap into an EG Civic
This guide covers installing a JDM H22A 2.2 L DOHC VTEC engine and gearbox from a Prelude into a 1992-1995 EG Civic hatch. The H22A brings substantially more torque and power than the factory D-series, and with a Hasport mount kit and driveshafts it becomes a bolt-in installation - the wiring is the only area that must be custom adapted, covering the injectors (via a resistor box), O2 sensor, VTEC, knock sensor, intake bypass solenoid and optionally EGR. The swap also demands some cutting: the driver-side gearbox mount is removed from the chassis, a scallop is cut near the passenger headlight for power steering pump clearance, and the shifter opening is enlarged for the Prelude's cable-shift assembly. The donor car documented here was a 1993 JDM VTi Civic hatch; the swap was a first-time conversion completed solo in three weeks (including an engine bay respray and certification) for a total on-road cost of about $5,545 in 2004, and subsequently ran a 14.2 s quarter mile at 101 mph on a 2.5-inch exhaust, high-flow cat and intake alone. ECU pin references below are for an OBD1 Civic. Adapted from a community writeup by honda_b_blastn on OzHonda (https://ozhonda.com/forum/showthread.php?13733-H22A-civic-experiance!!!), including corrections from the follow-up discussion.
Monthly Maintenance Checks for the EK Honda Civic (D16Y4/Y7/Y8)
A once-a-month inspection routine for EK-chassis Honda Civics with the D16Y4, D16Y7, or D16Y8 engine, aimed at owners new to working on their own car. Checking fluid levels, battery condition, tires, wheels, CV boots, and lights on a regular schedule catches developing problems long before the normal service interval would, and costs almost nothing beyond an hour or two on a weekend. Everything is done with basic hand tools on level ground; the only lifting required is getting each end of the car onto jack stands to pull the wheels. The same checks apply broadly to other Hondas of the era, with minor layout differences in the engine bay. The author also checks tires, coolant, and oil at every fuel fill-up. Adapted from a community writeup by EK1.6LCIV on OzHonda (https://ozhonda.com/forum/showthread.php?110146-Noob-Guide-to-monthly-checks-for-EK-Civic-s-and-the-D16Y4-7-8-engine), including corrections from the follow-up discussion.
Honda Valve Clearance (Tappet) Adjustment
Valve clearance (tappet or valve lash) adjustment restores the specified gap in the valvetrain, quieting the characteristic Honda tappet tick and protecting the rocker arms, valves, and camshaft from accelerated wear. Excessive lash left uncorrected can eventually damage a rocker arm, valve head, or camshaft. The procedure applies to virtually all Honda engines with screw-type tappet adjusters, SOHC and DOHC alike (D-series, B-series, H-series, F-series, from Civic to NSX); the exceptions are the C-series 2.5L and 2.7L Legend engines, which use hydraulic lifters on the intake side. The original author recommends checking clearances every 20,000 km. The engine must be stone cold (left overnight or at least several hours), and you must have the correct intake and exhaust clearance specifications for your exact engine before starting; there are no separate hot specifications for these engines. On SOHC engines the clearance is measured between the adjusting screw and the valve tip; on DOHC engines it is measured between the camshaft lobe and the rocker arm. Adapted from a community writeup by ECU-MAN on OzHonda (https://ozhonda.com/forum/showthread.php?15443-DIY-tappet-adjustment), including corrections from the follow-up discussion.
Honda Integra Ignition Control Module (ICM) Replacement
The ignition control module (ICM) lives inside the distributor and is a classic age-related failure point on 1990s Hondas. A failing ICM typically acts up when the engine is hot: the engine cuts out while driving (the car keeps rolling with little or no power), refuses to restart until it has cooled, and the tachometer becomes erratic, jumpy, or unresponsive. Before condemning the ICM, test the ignition coil and ICM per the Honda service manual (sections 23-95 and 23-96 of the 1994 Integra manual) — a failed coil never lets the car start at all, whereas an ICM fails intermittently — and rule out the main relay and fuel pump, which cause similar engine cuts. This guide is written for the DC2/DC4 Honda Integra with a B-series engine but broadly applies to other distributor-equipped Hondas, and replacing the module yourself avoids buying a complete distributor from Honda (about $700). Adapted from a community writeup by specialst on OzHonda (https://ozhonda.com/forum/showthread.php?127058-DIY-Ignition-Control-Module-(ICM)-Replacement-Lots-of-Pics!), including corrections from the follow-up discussion.
EK Civic LED Instrument Cluster and Climate Control Conversion
This conversion replaces the dated amber incandescent dash lighting in the EK-series Honda Civic with LEDs throughout: the instrument cluster, climate control unit (backlight and button indicators), ashtray light, hazard and rear demister switches, and, on automatics, the gear position indicator. It covers the full dash disassembly needed to reach every bulb, the soldered 3 mm LED-plus-resistor conversions for the circuit-board-mounted indicator bulbs, and removal of the amber diffuser printed on the back of the gauge faces so any LED colour renders correctly. The finished result can be any colour scheme you like; the original build ran white gauges with red hazard/demister switches and blue climate control buttons. Adapted from a community writeup by TbM on OzHonda (https://ozhonda.com/forum/showthread.php?150689-Comprehensive-Ek-Civic-Led-Cluster-and-Climate-control-Conversion-*Updated-22-07-11*), including corrections from the follow-up discussion.
Acura RDX SH-AWD Rear Differential Fluid Change
The rear differential in Acura's SH-AWD system uses a specialized dual-pump fluid whose friction modifiers degrade over time, even when the fluid still looks clean and thick on the way out. Changing it yourself on an RDX (and other Honda and Acura SH-AWD vehicles) is quick and cheap, sparing you the roughly $120-130 a dealer charges for the same work. Acura's schedule calls for the first change at 15,000 miles and every 30,000 miles afterward. The job is usually prompted by a maintenance-minder code ending in 6 (such as A6, A16, or B16), where the 6 designates rear-differential service on all-wheel-drive cars; that code can appear a bit earlier than the mileage interval because the system flags it ahead of the next scheduled visit. The whole procedure typically takes 15 to 30 minutes and needs no shop equipment beyond a hand pump and basic wrenches. Adapted from a community writeup by Mustachio on AcuraZine (https://acurazine.com/forums/3g-rdx-diy-faq-460/how-replace-rear-differential-fluid-%2430-983828/), including corrections from the follow-up discussion.
Honda S2000 Convertible Top In-Motion Interlock Bypass
The Honda S2000 will not raise or lower its power convertible top once the car is rolling, because a vehicle speed signal locks the top mechanism out above a walking pace. This guide shows how to defeat that speed interlock so the top can be operated while the car is moving, intended for off-road and track use only. The relevant wiring sits behind an interior side trim panel; on later (AP2, roughly 2006-plus) cars the target connectors are reached through the passenger-side pocket, and earlier (AP1) cars differ slightly in trim. Two approaches are covered: interrupting the speed sensor wire so the top works with the parking brake pulled up one click, and an optional second tap that removes even the one-click requirement. The de-pin method keeps the whole job reversible with no soldering. Adapted from a community writeup by LanceM on Club RSX (https://www.clubrsx.com/threads/diy-video-s2000-top-down-up-in-motion-mod.580659/), including corrections from the follow-up discussion.
Fitting a 1999-2000 Civic Si Front Lip to a 1992-1995 EG Civic Bumper
This guide covers mounting a front lip from a 1999-2000 sixth-generation Civic Si onto the front bumper of a 1992-1995 fifth-generation (EG) Civic. Because the Si bumper is slightly wider than the EG's, the lip will not simply bolt on flush; it needs one central anchor, double-sided tape along the face, and a pair of adjustable corner screws to draw the sides in and close the gap that otherwise appears at the front corners. The result is a low, clean front lip with no visible fasteners and no bodywork changes beyond a couple of small drilled holes. The whole job is far easier with the bumper removed from the car. Adapted from a community writeup by chameleon on K20A.org (https://www.k20a.org/threads/how-to-99-00-si-front-lip-install-on-a-92-95-eg-front-bumper.9854/), including corrections from the follow-up discussion.
Honda S2000 AP1-to-AP2 ("04") Front End Conversion
This guide converts the front end of a 2000-2003 (AP1) Honda S2000 to the 2004-and-later (AP2) facelift look, covering both the bumper and the harder-to-find headlight portion of the job. Because the two generations share the same core body, panels are broadly interchangeable: you can convert the bumper only (much faster), the headlights only, or both together as described here. The bumper swap requires reworking the front support beam and adapting the lower fasteners, while the headlight swap either drops in as plug-and-play if you buy the AP2 HID ballasts, or requires modifying the new housings and fabricating brackets if you reuse the original ballasts. Budget roughly $1500 to $2000 for parts, paint, and shipping. Read every step before ordering so you buy the right combination the first time. Adapted from a community writeup by thatguyjosh on S2KI (https://www.s2ki.com/forums/s2000-body-paint-232/how-complete-2004-front-end-conversion-282385/), including corrections from the follow-up discussion.
Aftermarket Threaded Shift Knob Install (7th Gen Honda Accord Manual)
This guide covers swapping the factory shift knob on a 6-speed manual 7th-generation Honda Accord (2003-2007) for a screw-on aftermarket knob that uses a threaded metal insert instead of set screws. A threaded-insert knob seats directly on the shaft and will not creep or spin during hard shifts the way set-screw designs can, and a shorter ball also reduces overall throw height for a more direct feel, especially when paired with a short shifter kit. The vendor's generic instructions do not match the 7th-gen console layout, so the sequence below is worked out for this car specifically; note that the V6 6MT console omits the boot-retainer clip and lets you skip that step. The work needs only hand pressure and a pair of small cutters. Adapted from a community writeup by RTexasF on DriveAccord (https://www.driveaccord.net/threads/monsterknob-install-pics.15361/), including corrections from the follow-up discussion.
Honda Accord to TSX Switchblade (Flip) Key Conversion
This guide covers converting the standard remote key fob from a 2008-2012 Honda Accord sedan into a 2009 Acura TSX flip-out ("switchblade") key. The project transplants the Accord's remote electronics - the lock, unlock and trunk switches, plus the optional status LED - into the TSX switchblade housing, then relocates the vehicle's immobilizer transponder so the reworked key can operate the remote functions and start the car. It appeals to owners who want the folding-key look without paying dealer prices for a purpose-built remote. Be realistic before starting: this is delicate fine-pitch soldering inside a cramped shell, and the original discussion records several problems that were never fully solved (a key that would not crank, an unreliable panic button, and a board stack too thick to close). Treat it as an experiment on a spare key rather than a guaranteed result. Adapted from a community writeup by Marc08EX on DriveAccord (https://www.driveaccord.net/threads/diy-09-tsx-switchblade-conversion-for-08-sedans.23134/), including corrections from the follow-up discussion.
Honda Crosstour Rear Sway Bar Upgrade Using the Acura TL AWD Bar
This guide swaps the factory 15MM rear anti-roll bar on a first-generation Honda Crosstour for the thicker 20MM bar fitted to the Acura TL AWD, a bolt-in change that firms up rear roll stiffness and sharpens turn-in without any cutting or fabrication. The larger bar reuses the Crosstour's existing bracket locations and endlinks, so the job is a straight component exchange rather than a suspension rebuild. It applies to 2010-2012 Crosstour models in both 2WD and AWD form; the writeup author performed it on a 2011 Crosstour AWD and reported noticeably better composure through corners afterward. Parts for the upgrade ran roughly $75.44 plus $10.95 shipping, about $86.39 total. Adapted from a community writeup by tlarimer on DriveAccord (https://www.driveaccord.net/threads/diy-acura-tl-awd-rear-sway-bar-to-crosstour-upgrade.166114/), including corrections from the follow-up discussion.
K-Series Short Shifter: Lowering the Knob Height and Tightening Throw
This guide covers a low-cost way to make an aftermarket K-series short shifter sit lower and shift tighter without buying a premium billet unit. Two separate changes are involved. First, the upper shaft is machined and re-threaded so the shift knob can be dropped roughly 1.5 inches, which suits drivers who find the factory knob height too tall. Second, the side-to-side cable pickup is relocated closer to the pivot to shorten lateral throw, mirroring the multiple mounting positions found on billet arms. Be aware of the trade-off raised in the discussion: because the pivot point is unchanged, trimming the shaft above it does not reduce throw on its own and slightly increases the effort at the knob, giving a firmer, more precise feel. The fore-and-aft throw itself can already be dialed in up to 40% shorter than stock using the shifter's own adjustment. This work is well suited to Acura RSX (DC5) and Integra applications during a build or K-swap. Adapted from a community writeup by Acurazor on K20A.org (https://www.k20a.org/threads/diy-short-low-shifter-mod.104992/), including corrections from the follow-up discussion.
Honda CR-Z: Keeping Factory HandsFreeLink Bluetooth When Replacing the Head Unit
The CR-Z's HandsFreeLink (HFL) module provides voice-controlled Bluetooth phone calling through the steering wheel buttons, but from the factory it only powers up when the OEM head unit is present. Owners who want to fit an aftermarket stereo normally lose this feature entirely. This guide explains how to keep the factory HFL system alive and functional on its own by supplying the module with the single enable signal it looks for and routing its audio into a modern head unit. It applies specifically to the CR-Z EX non-navigation trim; the navigation-equipped cars use a different wiring scheme and are not covered here. Retaining HFL also preserves conveniences tied to the module, such as the climate fan automatically dropping speed when a call is active. Because the procedure involves probing and tapping low-voltage wiring at the radio and HFL connectors, work methodically and confirm every pin with a meter before making a connection. Adapted from a community writeup by wizkid057 on CRZ Forum (https://www.crzforum.com/threads/diy-factory-bluetooth-handsfreelink-without-factory-radio.6504/), including corrections from the follow-up discussion.
Honda CR-Z JDM Red Hazard Switch Installation (Non-Navi Head Unit)
The CR-Z's factory hazard switch can be replaced with a JDM red-illuminated unit that lights up red at night and gives the center stack a cleaner, more aggressive appearance. This guide covers cars fitted with the non-navigation head unit. The JDM non-display switch (Honda part number 35510-SZT-J01) shares the same form factor as the US OEM switch, so the warning triangle sits the correct way up and no modification is needed. The task is purely a plug-in swap of one switch for another and involves no wiring changes, which makes it a good first interior job. Original availability was through A&J Racing, but that listing has since disappeared; the same part can be sourced from Japan via eBay or from UK Honda parts suppliers by quoting the part number. Adapted from a community writeup by jcrhee12 on CRZ Forum (https://www.crzforum.com/threads/diy-jdm-red-hazard-non-navi.4844/), including corrections from the follow-up discussion.
NRG Hood Damper Installation (Honda CR-Z)
Gas-strut hood dampers replace the factory manual prop rod on the Honda CR-Z, holding the hood open on their own and giving the engine bay a cleaner, more finished look. This guide covers fitting a bolt-on NRG damper set, which anchors to an existing screw location at the front of the bay and to the upper hood-hinge bolt on each side. The kit is rated for the stock steel hood only; a lighter aftermarket or carbon-fibre hood may not have the mass to seat properly against the damper resistance. No cutting or drilling is involved, and the whole job is done by hand in a few minutes. Adapted from a community writeup by stumcewing on CRZ Forum (https://www.crzforum.com/threads/diy-nrg-hood-dampers.10652/), including corrections from the follow-up discussion.
Honda CR-Z: Adding an Aftermarket Amplifier to the Factory Navigation Audio System
This guide covers adding an aftermarket amplifier to a Honda CR-Z fitted with the factory navigation head unit while keeping the original stereo and OEM amplifier fully in place. Instead of replacing the factory gear, the approach taps the audio signal as it travels from the nav head unit toward the factory amplifier, so an added amp runs in parallel to drive a subwoofer or an extra set of speakers for improved staging. A PAC AOEM-HON20 T-harness splices into the factory 20-pin amplifier connector to create that tap, and an optional blitzSafe HON/AUX-DMX V.2X adapter adds an RCA auxiliary input at the factory CD-changer port for external sources such as a DVD player or game console (note: this handles audio only, not video). An early reply assumed the stock amp was being removed; the builder clarified that the OEM amp is retained and only its input signal is tapped. This is a stage-one signal-tap and bench-verification writeup, so final enclosure fabrication and mounting are handled separately. It suits owners who already have amplifier and speaker equipment on hand and want to expand the factory system without losing OEM integration. Adapted from a community writeup by s7park on CRZ Forum (https://www.crzforum.com/threads/diy-amplifier-add-on-part-1.11173/), including corrections from the follow-up discussion.
Honda Civic EK Daytime Running Light Conversion (Relay-Driven Low Beams)
This guide adds always-on daytime running lights (DRL) to a sixth-generation Honda Civic (EK) that did not leave the factory with them, such as US-market cars. A single SPDT relay is used to switch the low-beam circuit on whenever the ignition is at the run position, so the headlights illuminate at reduced-visibility times without any driver input. The relay is triggered from the existing parking-light and low-beam wiring and grounded through the power-mirror harness, so no permanent modification to the vehicle's factory circuits is required. The same principle works on other Honda chassis such as the EG and EF, but you must confirm the trigger wire colors for your model against the service manual before tapping anything, because they differ between platforms. A genuine Honda DRL system instead runs the high-beam filaments through a resistor box to dim them; that approach is discussed at the end as an alternative. Adapted from a community writeup by silverctr on D-Series.org (https://www.d-series.org/threads/diy-daytime-running-lights-for-ek.7642/), including corrections from the follow-up discussion.
Repairing Cracked Interior Plastic Panels and Broken Mounting Clips
Aging interior trim commonly develops stress cracks, stripped screw bosses, and snapped speaker-panel clips, often made worse by earlier removal attempts. This guide shows how to reinforce that damaged plastic from behind using short lengths of steel paperclip melted into the panel with a soldering iron, creating an internal metal staple that holds the crack closed. The technique applies to almost any molded interior plastic in a Honda Prelude or similar vehicle, including door panels, DIN pockets, and speaker surrounds, and can restore a broken mounting clip well enough to seat the panel firmly again. It is an inexpensive alternative to hunting down discontinued trim pieces, and finished repairs survive normal handling and cold-weather flexing. For wider damage such as a bumper, the same idea works with a piece of window screen in place of a single wire. Adapted from a community writeup by brentm on PreludePower (https://www.preludepower.com/threads/diy-interior-panel-plastic-repair-pics.234772/), including corrections from the follow-up discussion.
8th-Gen Civic Big Brake Conversion (RSX Rotors with DC5/TSX Type-S Brembo Calipers)
This guide covers upgrading the front brakes on the 8th-generation (2006-2011) Honda Civic to a larger cross-platform setup using Acura RSX rotors together with the four-piston Brembo calipers found on the DC5 RSX Type-S or the TSX Type-S. The result is significantly more clamping area and heat capacity than the factory Civic brakes. Component choice matters: the Brembo calipers do not clear the standard rotor, so they are paired either with S2000 rotors (Honda OEM units are the strongest choice, though Brembo or Mountain blanks also work) or with rotor spacers on the existing rotor. The calipers run 350Z pads. The one piece of fabrication required is trimming the factory heat/dust shield for clearance; nothing else needs to be cut or modified to bolt everything up. Because it changes the front brake hardware, treat this as a safety-critical job and confirm a firm pedal before driving. Adapted from a community writeup by portabuddy on 8th Civic (https://www.8thcivic.com/threads/8g-civic-big-brake-conversion.235630/).
Honda Civic (8th Gen) VSA Toggle Switch: Disable Stability Assist by Default
On the eighth-generation Honda Civic, the Vehicle Stability Assist (VSA) system re-arms itself every time the car is started, forcing the driver to press the dash button on each startup to switch it off. This guide replaces that factory momentary pushbutton with a latching toggle so the system defaults to off whenever the engine is started, while still letting you re-enable it on demand for wet or low-traction driving. The work involves opening the original switch, soldering two leads onto its internal contacts, and routing them to a toggle. It also covers an important refinement discovered after the first attempt: a plain constant-on signal can upset the control module under hard acceleration, so a small relay circuit is added to convert each flip into the brief pulse the ECU expects. Adapted from a community writeup by NyanKandi on 8th Civic (https://www.8thcivic.com/threads/diy-disabling-vsa-by-default.600793/), including corrections from the follow-up discussion.
Build a Scratch-Free Home Tire Changing Station
This guide walks through building an inexpensive home station for mounting and dismounting tires without marking the wheel finish, which is what makes it worthwhile for anyone running freshly refinished or costly alloys and stiff, low-profile tires. It is built around a budget Harbor Freight manual changer that is modified and padded at every point that touches the rim, paired with a No-Mar bar and a set of bead clamps so the tire is worked over the lip with light effort rather than pried. The complete setup came to roughly $225, against the typical shop charge of about $25 per tire for mount and dismount, so it pays for itself quickly for an owner who changes tires seasonally. The method is wheel-agnostic: the slotted mounting plate accepts most common bolt patterns, so it is not tied to any single vehicle. Adapted from a community writeup by 737 Jock on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/diy-tire-changing-scratch-free-775843/), including corrections from the follow-up discussion.
Acura RSX EDi 6500 Component Speaker Install (Door and Dash Fitment)
This guide covers fitting an EDi 6500 component speaker set into the front doors and dash of an Acura RSX, in place of a typical CDT CL-61a set. The 6500 mids are physically deeper and carry mounting tabs plus an extra lip around the magnet, so unlike a straight CDT-frame swap they cannot simply drop into the factory opening on a spacer. Expect to fabricate MDF baffles, permanently trim the door sheet metal, and grind back the dash to seat the tweeters. If you prefer a no-cut install, the shallower EDi 6000 set shares the CDT CL-61a frame and magnet and mounts on a 3/4 inch baffle alone. The reward for the extra work is a noticeably louder, cleaner front stage. This procedure assumes the door panels and factory speakers are already removed and the new wiring is run; those basics are common to any RSX front-stage job. Adapted from a community writeup by Locotony on Club RSX (https://www.clubrsx.com/threads/edi-6500s-diy-guide.355174/), including corrections from the follow-up discussion.
Acura 1G TL (2.5) Engine Mount Replacement
This guide covers removing and replacing the hydraulic engine mounts on the first-generation Acura 2.5 TL inline-five. Failed mounts allow excess engine movement, which typically shows up as a clunk when selecting a gear and as rough or harsh shifting. The passenger-side and driver-side jobs are broadly similar, with one important difference: the driver-side mount will not clear the frame with the axle in place, so that side also requires pulling the axle, draining the differential, and fitting a fresh axle set ring. Before buying mounts, confirm the mounts are actually the fault, since braking and steering-wheel vibration on these cars is frequently caused by worn axles rather than the mounts. Adapted from a community writeup by pi1996 on AcuraZine (https://acurazine.com/forums/1g-tl-problems-fixes-118/diy-engine-mount-589802/), including corrections from the follow-up discussion.
Acura 1G TL Rear Lowering Spring and Strut Replacement
This guide covers swapping the rear coil springs on the first-generation Acura TL (2.5TL and 3.2TL, 1995-1998) for a set of lowering springs, with the option of replacing the rear struts at the same time. It is a practical way to drop the rear ride height and refresh worn suspension on a high-mileage car. The rear strut top mounts on this chassis sit under the rear seat, so the job starts inside the cabin rather than under the car, and the coil spring stores enough energy to be dangerous if handled carelessly. Owners report the first side is slow and awkward, while later corners go much faster once the sequence is understood. Reusing the factory struts with lowering springs gives a mild, streetable drop; pairing new dampers with the springs increases the drop and improves ride control. Adapted from a community writeup by KrayzieDxC on AcuraZine (https://acurazine.com/forums/1g-tl-tires-wheels-suspension-103/diy-rear-suspension-683125/), including corrections from the follow-up discussion.
Honda D17 SOHC VTEC "Mini-Me" Conversion (2001-2005 Civic)
This guide covers a "Mini-Me" VTEC conversion for the seventh-generation Honda Civic (2001-2005) fitted with the non-VTEC D17 SOHC engine found in DX, LX, and VP trims. By transplanting the VTEC cylinder head from an EX D17 and driving its VTEC solenoid with an aftermarket Apexi VAFC2, you gain a variable valve-timing top end without sourcing an EX engine computer or paying to have the immobilizer key reflashed. The payoff is noticeably stronger high-rpm pull on an otherwise stock short block. This is a genuine head removal-and-replacement combined with custom wiring, so budget the time and mechanical confidence accordingly; a first-timer is better off having a shop handle the head work. Adapted from a community writeup by xproductionz on Honda-Tech (https://honda-tech.com/forums/honda-civic-2001-2005-78/%5Bfaq%5D-d17-2001-sohc-vtec-mini-me-writeup-965772/), including corrections from the follow-up discussion.
Acura Integra (G3) Factory Radio / Head Unit Removal
This guide covers removing the factory head unit from a third-generation (G3) Acura Integra so you can service the stereo or fit an aftermarket unit. Reaching the radio requires taking out the lower center console, because the radio bracket is secured from behind the console rather than from the face of the dash. The procedure applies whether the car still has its original stereo or an aftermarket deck already installed, since the disassembly path to the radio cavity is the same in both cases. There is a quicker shortcut some owners use to yank the radio out, but it leaves the unit difficult to reseat; the method here is the full, reversible teardown that lets you reinstall cleanly. Adapted from a community writeup by MorningZ on Team Integra (https://www.team-integra.net/threads/g3-radio-removal.342479/), including corrections from the follow-up discussion.
9005 Bulb Conversion for Third-Generation Integra Projector Headlights
This guide covers modifying a pair of 9005 halogen bulbs so they seat in the 9006 headlight sockets of a projector-equipped Integra, giving a noticeably brighter output than the factory bulbs at a fraction of the cost of an HID retrofit. It applies to the third-generation (94+) Integra, which uses projector housings that keep the beam aimed at the road; on reflector housings the extra output would scatter and dazzle oncoming drivers, so it should not be attempted there. The 9005 and 9006 bulbs share nearly identical bases and differ only in their anti-mismatch keying, so a small amount of trimming lets the higher-output 9005 drop into the 9006 location. Adapted from a community writeup by tony4311 on Team Integra (https://www.team-integra.net/threads/g3-9005-headlight-conversion.342576/).
Honda Fit Headlight Tinting and Blackout Painting
This guide covers customizing the Honda Fit headlights by smoke-tinting the internal amber reflector and running light cover and refinishing the plastic trim covers in semi-gloss black. The result darkens the amber sections and blacks out the surrounding plastic for a cleaner, more aggressive front-end look while keeping the main projector lens clear. Because the paint is applied to parts inside the housing, the headlight must first be opened and separated into its components, then reassembled once everything has cured. This is a cosmetic modification only and does not affect how the lights mount or wire into the car. Adapted from a community writeup by smeister on FitFreak (https://www.fitfreak.net/forums/fit-interior-exterior-illumination/18060-diy-painting-headlights.html).
Restoring Clarity and Shine to Automotive Hard-Plastic Trim by Sanding and Polishing
This guide covers how to remove molded texture, haze, and light scratches from hard plastic pieces and bring them to a clear, reflective finish using nothing more than hand sanding and a plastic polish. It suits a wide range of components found in and around most Honda and Acura vehicles, including dash trim blanks, seat adjuster levers, gauge cluster lenses, turn-signal and corner lenses, taillights, and even oxidized headlight lenses. The technique only works on genuinely hard plastic; softer, flexible interior panels will not respond and can be ruined, so candidate selection and a hidden test spot are the first priorities. The demonstration piece is a dash trim blank from a 1991 Accord, but the same process transfers to any suitably rigid plastic surface. Adapted from a community writeup by TypeG on DriveAccord (https://www.driveaccord.net/threads/diy-plastic-polishing.4220/), including corrections from the follow-up discussion.
Acura 1G CL Intake Resonator (Air Silencer) Removal
The factory intake resonator, or air silencer, on the first-generation Acura CL muffles induction noise. Removing it opens up the intake note for a louder, more aggressive sound - most noticeable when VTEC engages - at essentially no cost, though the real-world power gain is negligible. This guide covers the 3.0 CL and applies equally to the 2.3 CL of the same generation. The resonator is buried behind the airbox and the driver's-side inner fender liner, so most of the work is patient disassembly rather than anything mechanically difficult. Because the plastic fender-liner clips are fragile and the intake opening ends up sitting low in the fender, plan for a few broken clips and understand the added risk of drawing in water. Adapted from a community writeup by hougee on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/intake-resonator-removal-instructions-3-0s-414435/), including corrections from the follow-up discussion.
Wiring Subwoofers and Amplifiers to the Trunk in a 1st-Gen Acura CL
This guide covers routing amplifier and subwoofer wiring from a dash-mounted head unit back to the trunk of a first-generation Acura CL (1997-1999, both the 2.3 four-cylinder and 3.0 V6 models), and mounting the amplifiers behind the rear seats. It is aimed at a typical build with an aftermarket head unit already fitted, a subwoofer enclosure, and separate amplifiers for the subs and the rear 6x9 speakers. The work involves getting a heavy power lead from the battery into the cabin, carrying it and the signal cables rearward without drilling unnecessary holes, and delivering everything cleanly to the trunk. Two routing methods are described — a permanent path under the seats and door sill, and a quick coat-hanger fishing technique — so you can choose whichever suits your car. Adapted from a community writeup by Ecct on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/diy-request-how-run-wires-headunit-subs-trunk-482929/), including corrections from the follow-up discussion.
Honda Civic (10th Gen) Rear Trunk Emblem Replacement
This guide covers swapping the rear 'H' emblem on a 10th-generation Honda Civic sedan, for example trading the factory chrome badge for a blacked-out version. The emblem is mounted on the outer rear garnish of the trunk lid, and the same garnish also carries the reverse camera and the number-plate LED light, so the same removal sequence applies if you ever need to service either of those components. Because the garnish is secured by hidden clips and a bolt reached from behind, the job is more involved than it first appears: you must drop the inner trim panel on the underside of the trunk lid to release the fasteners and disconnect the wiring before the garnish will come free. No cutting of the car is required, only careful handling of plastic clips. Expect roughly ten to fifteen minutes once you are familiar with the layout, and a bit longer on the first attempt. Adapted from a community writeup by Mike42dk on Civinfo (https://www.civinfo.com/threads/how-to-change-rear-honda-logo-4-door.422462/), including corrections from the follow-up discussion.
Acura CL (1G) Clogged Evaporator Drain Cleaning
On the first-generation Acura CL, condensation from the air-conditioning evaporator is supposed to drain out under the car through a hose and spigot in the passenger-side HVAC housing. When that drain clogs, water backs up inside the evaporator case and spills into the passenger footwell instead of dripping onto the ground. Owners typically notice this in humid weather: the carpet gets wet, water sloshes into view during hard left turns or under acceleration, and little or no condensate is seen beneath the car. Because the trapped water sits near the ECU, clearing the drain promptly protects the electronics as well as the interior. This guide covers accessing the housing, optionally refreshing the seal between the blower and evaporator, and flushing the drain without discharging the air-conditioning system. Adapted from a community writeup by Tehvine on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/diy-leaky-evap-box-clogged-drain-495059/), including corrections from the follow-up discussion.
2001 Honda Accord Front Strut and Damper Replacement
This procedure covers removing and rebuilding a front strut assembly on a 2001 Honda Accord EX (sixth-generation, 1998-2002), and applies equally whether you are replacing worn dampers or chasing a front-end rattle. A common cause of that rattle is the upper rubber mount bushings being installed upside down, which lets them shear against their washers, combined with collapsed bump stops. Because the coil spring must be compressed off the car to reach the damper, treat the bushings and bump stops as a package and renew them whenever the damper comes out. The single most awkward point, which the Haynes manual glosses over, is freeing the lower fork past the end of the damper; this guide gives the workaround. Adapted from a community writeup by keep_hope_alive on DriveAccord (https://www.driveaccord.net/threads/2001-accord-front-strut-swap-how-to.74969/), including corrections from the follow-up discussion.
Honda Fit (GE8) Panoramic Wink Mirror Installation
A wide-angle five-panel wink mirror replaces the narrow factory rear-view glass with a curved multi-segment surface, giving a much wider field of view behind and to the sides of the car. This install mounts an aftermarket panoramic mirror to the second-generation Honda Fit (GE8) by reusing the sun-visor mounting point in the headliner rather than clipping over the stock mirror. Because the visor bracket sits partly inside the headliner, the trickiest part is capturing a small nut behind the trim while threading a bolt into it by feel. The payoff is a dramatically wider view that helps in dense traffic and at intersections, at the cost of some clarity in low light. Plan on losing a nut or two into the headliner before the fastener catches. Adapted from a community writeup by sandblasted on FitFreak (https://www.fitfreak.net/forums/2nd-generation-ge8-specific-diy-repair-maintenance-sub-forum/60373-diy-5-panel-wink-mirror-ge8.html), including corrections from the follow-up discussion.
Honda Fit (GE) DIY Mesh Guard for the A/C Condenser Grille Opening
The exposed lower opening on the second-generation Honda Fit (GE) leaves the air-conditioning condenser directly in the path of stones and road debris, and a punctured condenser is an expensive repair. This budget project fits a blacked-out protective mesh across that opening using inexpensive barbecue grill panels and zip ties, with no drilling and no bumper removal. It applies to the 2011 Fit Base and other GE-chassis Fits that share the same open grille area. Because the mesh mounts entirely with cable ties behind the factory upper grille, the modification is fully reversible and leaves the car unmarked. Adapted from a community writeup by Red Rockit on FitFreak (https://www.fitfreak.net/forums/2nd-generation-ge8-specific-diy-repair-maintenance-sub-forum/64406-2011-fit-base-diy-c-condensor-mesh-grill.html), including corrections from the follow-up discussion.
Honda Civic Handbrake (Parking Brake) Cable Tension Adjustment
Excessive brake dust and small black deposits on the rear alloy wheels are frequently blamed on the pad compound or the stability system, but on many Civics the real cause is a parking-brake cable set too tight from the factory or during a prior service. When the cable holds residual tension with the lever fully down, the rear pads never fully release, so they drag on the discs, run hot, shed dust, and wear prematurely. This guide covers diagnosing that drag and slackening the cable at the in-console adjuster so the rear wheels spin freely with the lever off while the brake still holds securely when applied. It applies to Honda Civic models with a hand-lever parking brake and rear disc brakes. Note that binding can also come from seized caliper sliders or worn-out pads and discs rather than the cable, so confirm the source before assuming the adjustment alone will fix it. Adapted from a community writeup by Munro on Civinfo (https://www.civinfo.com/threads/how-to-adjust-the-handbrake-lever-tension.27760/), including corrections from the follow-up discussion.
Honda Civic Front Brake Disc and Pad Replacement
Replacing worn front discs and pads restores braking performance and is well within reach of a home mechanic with basic tools. This guide covers the front brakes on the Honda Civic; owners in the thread carried the job out on 1.8 and 2.2 versions of the eighth-generation car, whether fitting genuine Honda parts or aftermarket upgrades such as EBC Greenstuff pads with grooved or drilled discs. Common reasons to do the work are discs reaching the end of their service life, heavy brake dust from factory pads, or friction material worn down to the wear indicator. Budget roughly an hour or two per axle and take particular care over how you retract the caliper piston, which is the one point experienced members flagged repeatedly. Adapted from a community writeup by Sfinx on Civinfo (https://www.civinfo.com/threads/how-to-replace-front-brake-discs-and-brake-pads.32557/), including corrections from the follow-up discussion.
Honda Civic FN2 Headliner (Roof Lining) Removal and Refit
This guide covers dropping and removing the one-piece headliner from a Honda Civic FN2 (the European eighth-generation three-door hatch, including Type R and Type S trims), then refitting it. Pulling the roof lining is the usual first step before applying roof sound deadening, chasing a rattle, retrimming the panel, or accessing wiring and the dome light circuit above the cabin. Because the panel is anchored by the grab handles, sun visors, interior lights, rear seatbelt top mounts and hidden clips near the tailgate, the job is really a sequence of small releases done in the right order so nothing is forced or cracked. Work slowly around plastic clips, as they are easily broken. To reinstall, run the sequence in reverse and reconnect every plug before the panel is clipped back up. Adapted from a community writeup by WAR Machine on Civinfo (https://www.civinfo.com/threads/how-to-remove-a-fn2-roof-lining.54931/), including corrections from the follow-up discussion.
Honda Fit (GE8) J's Racing Rear C-Pillar Bar Installation
The J's Racing C-pillar bar is a bolt-on chassis brace for the 2nd-generation Honda Fit (GE8 / Jazz GE) that ties the two rear upper seatbelt anchor points together across the cabin, stiffening the rear structure to sharpen turn-in and reduce body flex without any cutting or drilling. It shares the anchor hardware with the factory seatbelts, so the belts continue to function after the install. This writeup covers the C-pillar bar specifically; the matching J's Racing rear strut bar mounts the same way as the popular Cusco rear strut bar and is referenced in the original thread. Note that the front J's Racing strut bar is made for right-hand-drive cars only and will not clear a left-hand-drive GE's steering components and fluid reservoirs, so left-hand-drive owners should look at the Cusco front bar instead. The whole job needs only basic hand tools and roughly an hour. Adapted from a community writeup by jdmsneakerhead on FitFreak (https://www.fitfreak.net/forums/2nd-generation-ge8-specific-suspension-brakes-sub-forum/54021-j-s-racing-rear-strut-bar-c-pillar-bar-diy-included.html), including corrections from the follow-up discussion.
Honda Civic Rear Indicator Bulb Swap and Facelift/Type R Lens Conversion
This guide covers replacing the rear turn-signal bulbs on a Honda Civic and fitting the later facelift or Civic Type R clear indicator lenses. Because the standard car uses a plain (white) bulb behind an orange lens, moving to a clear or lightly tinted lens means the bulb itself must now supply the amber colour, so amber WY21W bulbs are required. The only real obstacle is that the locating tabs on the original indicator bulb holder do not line up with the newer lens; this is solved by lightly modifying the holder (or the lens). The brake-light side of the assembly needs no changes. The result is the cleaner factory-updated rear-light look while keeping a road-legal amber flash. Adapted from a community writeup by Syx on Civinfo (https://www.civinfo.com/threads/how-to-install-ctr-indicators-and-or-replace-rear-indicator-bulbs.70921/), including corrections from the follow-up discussion.
Honda Civic Flip Key Conversion: Transponder Transplant
This guide covers converting a standard Honda Civic ignition key into a folding "flip" key by transplanting the original transponder into an aftermarket flip-key case. The immobiliser code is stored in the metal key chip, while a small ferrite transponder antenna signals the car's ECU that a valid key is present; simply dropping the transponder loose into a flip case fails, because it then sits too far from the ignition barrel to be read. The work therefore involves cutting a matching blade, freeing the transponder from its original circuit board, and re-mounting it on fine wire close to the barrel. It applies to Honda Civics that use a soldered-in transponder (8th-generation and similar); by contrast, some models such as the 7th-generation Accord use a loose transponder that needs no desoldering, so identify your key type first. Attempt it with a spare key on hand, because an error can leave you unable to start the car. Adapted from a community writeup by Rillo Boy on Civinfo (https://www.civinfo.com/threads/flip-key-conversion-for-the-cowards.75090/), including corrections from the follow-up discussion.
Honda Civic 1.8 Manual Transmission Fluid Change (8th Gen R18)
This guide covers a drain-and-refill of the manual gearbox oil on the 1.8-litre (R18) 8th-generation Honda Civic. Renewing the transmission fluid at service intervals keeps shift quality consistent and flushes out accumulated wear particles, and it is a job most owners can complete at home with basic tools and a jack. The transmission uses a fill-to-spill level system, so the exact quantity matters less than topping up until fluid weeps back out of the fill hole with the car sitting level. The single biggest challenge is managing the drained oil cleanly, because the drain plug sits close to the inner CV joint and the under-car shield. Work only on a properly supported vehicle and use fresh crush washers on both plugs. Adapted from a community writeup by Woodlikesbikes on Civinfo (https://www.civinfo.com/threads/how-to-change-1-8-manual-transmission-fluid.425313/), including corrections from the follow-up discussion.
Honda Civic Mk9: Replacing the Factory Honda Connect Head Unit with an Aftermarket CarPlay Double-DIN
This guide covers swapping the factory Honda Connect infotainment unit in a ninth-generation (Mk9) Honda Civic for a modern aftermarket double-DIN head unit with Apple CarPlay, using a JVC KW-M560BT as the example unit. It applies to Mk9 Civics fitted with Honda Connect, including facelift cars from around 2015 onward and versions carrying built-in Garmin navigation and the dated Android 4.0.4 software. The upgrade delivers a faster, smoother interface and phone mirroring while retaining the original reversing camera and the main steering wheel controls. Before buying, note an important limitation raised in the discussion: the Connects2 adapter is advertised as not rated for amplified audio systems or for cars with factory built-in navigation, so confirm your exact configuration first. Adapted from a community writeup by amrits90 on Civinfo (https://www.civinfo.com/threads/honda-connect-replacement.431814/), including corrections from the follow-up discussion.
Acura RSX Moonroof Auto-Stop Delete
Many RSX moonroofs pause partway through the closing cycle, forcing you to hold the switch until the glass finishes travelling. This guide removes that behavior by disconnecting the sensor connector that triggers the mid-travel stop, so the roof runs the full open and close cycle in a single press. The work is entirely reversible, uses no additional parts, and involves partially lowering the rear of the headliner to reach a connector on the left side of the roof. It applies to the Acura RSX (DC5) and the closely related Honda Civic Si hatchback (EP3), which share the same interior layout. Set aside about half an hour and keep track of every fastener you remove so reassembly is straightforward. Adapted from a community writeup by minnSi on Club RSX (https://www.clubrsx.com/threads/diy-moonroof-auto-stop-delete.808136/), including corrections from the follow-up discussion.
Acura RSX (DC5) Interior Door Panel Removal
Removing the interior door panel (door card) is the first step for replacing door speakers, refinishing or upgrading the panel, or servicing the window switch and door latch cable on the Acura RSX (DC5, 2002-2006). This walkthrough covers releasing the tweeter cover, door pull, retaining screws, hidden clips, and the latch cable so the panel lifts cleanly off the door, plus the key detail to watch when putting everything back. Owners of the closely related Civic (EP3) will find the sequence largely the same. The job needs only two hand screwdrivers and takes well under an hour. Adapted from a community writeup by minnSi on Club RSX (https://www.clubrsx.com/threads/diy-door-panel-removal.808367/), including corrections from the follow-up discussion.
DIY JDM-Style Shift Boot Trim Ring Using a Honda Valve Cover Washer
This guide covers building a budget trim ring that gives the shift boot in an Acura RSX / Honda Integra (DC5) the flared, tailored look of a genuine JDM boot for only a few dollars. The trick is a common Honda valve cover sealing washer: once its center hole is opened up, the metal washer slides over the shifter and seats at the base of the knob, cleaning up the line of the rubber boot and holding it in a neater resting position. A factory or aftermarket JDM-style boot typically runs from around $50 used to $90 new, so this is a cosmetic upgrade for people who want the appearance without the cost. It changes only how the boot looks and sits, not how the shifter works. The write-up also incorporates the most reliable retention method surfaced in the discussion, because the original glue-only approach proved fragile in later reports. Adapted from a community writeup by danito321 on Club RSX (https://www.clubrsx.com/threads/diy-homemade-jdm-shift-boot.865197/), including corrections from the follow-up discussion.
Honda Fit/Jazz A/C Button Backlight Bulb Replacement
The illumination behind the climate control A/C switch on the first-generation Honda Fit and its Jazz equivalent (GD, roughly 2002-2008) fails commonly, leaving either the white 'A/C' legend or the blue on/off indicator dark. This guide covers reaching the switch, extracting the tiny bayonet bulb, and swapping it, along with the part numbers owners have confirmed and the retaining bolt the original post left out. Dealers have quoted well over an hour of labour for what is a fiddly but low-cost repair, so it is worth doing yourself if you are patient with delicate trim clips. The same access procedure applies whether you are chasing the white panel backlight or the blue indicator lamp. Adapted from a community writeup by kodok3ribu on FitFreak (https://www.fitfreak.net/forums/fit-diy-repair-maintenance/73640-diy-replacing-c-button-backlight.html), including corrections from the follow-up discussion.
Acura RSX Budget Mesh Front Grille (Gutter-Guard DIY)
This guide covers building a blacked-out mesh front grille for the Acura RSX using aluminum gutter-guard sheet as the grille material, for roughly $15 CAD (about $7-9 USD) in parts. It replaces or fills the lower center bumper opening with a clean custom mesh and, unlike commercial kits, protects the air-conditioning condenser behind the opening from road debris. The method here is written for the 2005-2006 RSX, whose lower bumper carries a removable plastic insert that doubles as a cutting template; 2002-2004 cars have a fixed center section that must be cut out with a rotary tool, making the job harder. The same idea also works on the Integra. Expect a straightforward afternoon project with basic hand tools. Adapted from a community writeup by Hellie on Club RSX (https://www.clubrsx.com/threads/diy-05-custom-front-grill.317165/), including corrections from the follow-up discussion.
K-Series Engine Swap into Civic EG / Integra DC Chassis (Part 1: Mounting)
This guide covers the first phase of dropping a Honda K-series engine and transmission into an EG-generation Civic or a DC-generation Integra: stripping the bay of the outgoing B- or D-series driveline, cutting the chassis clearances the K-series requires, and hanging the new engine on a conversion mount kit. Because the K-series sits and mounts differently from the factory B/D driveline, portions of the original transmission bracket and subframe condenser brackets must be removed, the radiator gets relocated, and the swap relies on a kit that reuses the tow-hook location for a timing-chain-side mount. Read through fully before starting, since several fasteners are left finger-tight until the whole assembly is aligned and only then cross-tightened. This is heavy, fabrication-adjacent work that generally calls for a hoist, a helper, and a comfortable place to cut metal. Adapted from a community writeup by K20EG on K20A.org (https://www.k20a.org/threads/k-series-swap-guide-part-1.179/), including corrections from the follow-up discussion.
Honda Fit Walbro 255 Fuel Pump Install with AN Return Line
This guide covers swapping the factory in-tank fuel pump on a Honda Fit for a Walbro 255 and adding a dedicated AN feed/return pass-through so the pump can supply a fuel system regulated at the rail. It suits higher-output builds that have outgrown the stock pump and its integral regulator. The work involves cutting and drilling the pump assembly to route an AN bulkhead through the top hat, sealing that pass-through, and reworking the cradle to accept the slightly larger Walbro. Treat it as a fabrication job rather than a bolt-in: sealing surfaces and hose retention are what keep fuel inside the tank. The original poster noted the setup had not yet been fully validated when the writeup was published, so pressure-test every joint and confirm there are no leaks before running the car. Adapted from a community writeup by breadman on K20A.org (https://www.k20a.org/threads/diy-fit-walboro-install-and-return-line.114862/), including corrections from the follow-up discussion.
Diagnosing Dead ECT, CMP and Wideband O2 Signals After a K-Series Conversion Harness Swap
A K-series engine swap that cranks, starts and datalogs can still leave individual sensor channels blank, which makes the car impossible to tune. This guide walks through isolating why the coolant temperature (ECT), cam position (CMP) and wideband air/fuel (O2) values fail to appear in the KPro software after a conversion harness is fitted. It was written around a 12.5:1 build using a K24A1 block with a K20A2 head installed in a 1998 DC2 chassis, running a USDM PRB ECU from an RSX Type-S with Hondata KPro, and a European CR-V K24 engine harness. Those specifics matter because a EUDM harness does not share the same wire colours or ECU-connector pin positions as the USDM ECU it is being mated to, and because a counterfeit or internally damaged ECU can produce the exact same missing-signal symptoms as a wiring fault. The method below separates the three likely culprits in turn: a fake or failed ECU, a harness that routes sensor wires through the wrong path (for example the C101 bulkhead connector), and genuinely dead sensors. The payoff is a clean way to prove whether the swap wiring is actually wrong or whether the ECU itself is at fault before you keep chasing the harness. Adapted from a community writeup by kricha87 on K20A.org (https://www.k20a.org/threads/strange-problem-with-conversion-harness-o2-and-other-sensors.102259/), including corrections from the follow-up discussion.
Honda CR-Z HKS Kansai Rear Hatch Brace Installation
This guide covers fitting an HKS Kansai rear hatch brace to the Honda CR-Z (ZF1 hybrid). The brace ties the two rear strut/hatch anchor points together through a pair of white mounting brackets that sandwich over the factory black brackets, stiffening the rear of the chassis. The bulk of the work is careful teardown of the cargo-area trim to reach the mounting points, plus trimming two side panels so they clear the finished bar. A key reason to choose the Kansai over the Cusco alternative is serviceability: the Kansai's hardware stays accessible and can be removed later with hand tools, whereas the Cusco anchors behind the plastic panels. Because the trim clips and panels crack easily when cold, do this work when the car and its plastics are warm. Adapted from a community writeup by zeropointzero on CRZ Forum (https://www.crzforum.com/threads/partial-diy-hks-kansai-rear-hatch-brace-installed.3636/), including corrections from the follow-up discussion.
Honda CR-Z Projector Headlight Blackout and Amber Reflector Delete
This guide covers de-chroming and 'blacking out' the projector-style headlight assemblies on the Honda CR-Z (ZF1), along with deleting the amber turn-signal reflector for a cleaner front-end look. The work involves splitting each sealed housing, fully disassembling the internal projector, DRL, and turn-signal modules, painting the exposed chrome trim, then rebuilding and resealing the unit. The most demanding part is freeing the projector shroud and DRL assembly from the housing so the chrome around the HID bulb can be refinished; expect this to be slow and fiddly. Because the CR-Z headlight contains an HID igniter and metal brackets, the housing is opened with a heat gun rather than an oven. Any color can be substituted for black, and the small blue accent behind the projector can be masked off and preserved or repainted to taste. Moisture control on reassembly is critical, since a poorly resealed lens will fog. Adapted from a community writeup by mdbrich on CRZ Forum (https://www.crzforum.com/threads/diy-headlight-blackout-clearing-and-led-mounting.4543/), including corrections from the follow-up discussion.
Honda CR-Z Cusco Rear Strut Bar Installation (EX With Subwoofer)
This guide covers fitting a Cusco rear strut bar to a Honda CR-Z, with the extra work required on EX models. On a standard CR-Z the bar is essentially a documented bolt-in job, but the EX carries a rear subwoofer that sits over the left mounting point and blocks the body hole the kit needs. To make the bar fit, the left rear trim and subwoofer have to come out, one subwoofer mounting tab must be reshaped, and a longer bolt is needed where the subwoofer and strut mount share a hole. The result is a rear chassis brace that ties the two strut towers together to stiffen the rear of the car. The procedure below assumes an EX; owners of non-EX cars can skip the trim and subwoofer steps and simply mount the bar. Adapted from a community writeup by InsightRacer on CRZ Forum (https://www.crzforum.com/threads/diy-notes-cusco-rear-strut-bar-install-on-ex.10120/), including corrections from the follow-up discussion.
Honda CR-Z License Plate Bulb Replacement (LED Upgrade)
This guide covers swapping the two rear license plate lamps on the Honda CR-Z from the factory incandescent bulbs to T10 wedge-base LEDs. The lenses are held in place by hidden wedge tabs rather than a visible pry slot, which is the single detail that traps most people and leads to scratched paint or cracked plastic. Once you know where to apply the tool, the whole job takes only a few minutes per side and needs no disassembly of the bumper or trim. The upgrade gives a cleaner white output over the yellowish stock lamps, and on the CR-Z the license plate circuit does not trigger a dashboard warning for LED bulbs. Adapted from a community writeup by 09csM on CRZ Forum (https://www.crzforum.com/threads/diy-license-plate-bulb-replacement-tho.10843/), including corrections from the follow-up discussion.
Honda CR-Z Navigation Splash Screen Replacement
The Honda CR-Z factory navigation system shows a fixed opening splash image every time it powers up. This guide covers replacing that stock graphic with a custom design of your own. The visible splash is stored as a bitmap packed inside a binary container on the navigation DVD; by copying that file off the disc, swapping in your artwork with a small command-line tool, and burning a fresh disc, you can flash a personalized screen that the head unit then keeps permanently. The process is fussy about image color profiles and disc format, so it rewards precise, exact work rather than improvisation. It has been reported to succeed on the original 2010/2011 discs and on the 2014 update disc (where the relevant file is renamed and the extra graphics are gone), but not on the 2015 USB update, which stores images in an unsupported map file format. Be aware that altering the navigation software is unofficial and could affect your vehicle warranty. Adapted from a community writeup by stonyt10 on CRZ Forum (https://www.crzforum.com/threads/diy-change-navi-splash-screen.11220/), including corrections from the follow-up discussion.
Honda Prelude Door Panel Recovering with Automotive Carpet
This guide covers refreshing a tired lower door panel on a Honda Prelude by wrapping it in automotive carpet, giving the interior a clean, factory-plus appearance without buying a replacement panel. The lower section of the door card is stripped, re-covered with fresh carpet bonded by spray adhesive, and reinstalled. Plan on about a foot-by-four-foot piece of carpet per panel, which leaves generous margin for wrapping the edges. The technique is forgiving on the large curved face because thick automotive carpet stretches without bubbling, and it can be adapted to vinyl, suede, or leather if you prefer a different finish. Budget a couple of hours per door and work slowly around the pocket and speaker cutouts, where a rushed cut is hard to hide. Adapted from a community writeup by brentm on PreludePower (https://www.preludepower.com/threads/diy-door-panel-revitalization-pics.234885/), including corrections from the follow-up discussion.
MaXpeedingRods Coilover Installation on the 8th-Gen Honda Civic
This guide covers fitting a full set of MaXpeedingRods adjustable coilovers to the eighth-generation Honda Civic, replacing the factory front struts and the separate rear shock-and-spring assemblies. These budget coilovers provide height adjustment, an independent spring-perch adjustment, 24-way damping adjustment, and adjustable front camber plates, with spring rates of 392 in/lbs at the front and 336 in/lbs at the rear. Owners choose a setup like this to lower the car, sharpen handling, and dial in a personalized stance without paying premium-brand prices. The front corners are relatively quick; the rear takes more patience because the shock and coil are separate components and the original spring has to be worked out of the suspension. Expect to re-check and re-set ride height several times during the first week while the springs settle. Adapted from a community writeup by Bulli Kid on 8th Civic (https://www.8thcivic.com/threads/maxpeedingrods-coilover-installation-guide.658663/), including corrections from the follow-up discussion.
Honda Civic (8th Gen) ABS Warning Light Diagnosis and Wheel Speed Sensor Replacement
This guide walks through pinpointing why the ABS warning light stays lit on an 8th-generation Honda Civic (including the EX) and replacing a failed wheel speed sensor. Rather than relying on a dash blink-code procedure, the diagnosis is done directly with a multimeter: each of the four wheel speed sensors is resistance-tested at the ABS modulator's multi-pin connector, the suspect corner is confirmed at the sensor itself, and the faulty unit is swapped. The procedure also covers the simple checks that are easy to overlook, such as the relevant fuses and the brake fluid level switch. Note that the 7th-generation trick of jumping the connector to flash a stored code is not used here, both because it is not reliable on the 8th generation and because probing the harness without a full schematic risks damage. Doing this yourself avoids a shop diagnostic fee and, in this case, corrects damage left behind after an earlier strut job. Adapted from a community writeup by Zunyr on 8th Civic (https://www.8thcivic.com/threads/diy-abs-light-troubleshooting-repair.596737/), including corrections from the follow-up discussion.
Enabling Factory Remote Trunk Release on an 8th-Gen Honda Civic LX Sedan
Many eighth-generation Honda Civic LX sedans (2006-2011) already carry the body wiring needed for a factory remote trunk release; the feature sits dormant because the LX trim shipped without a powered latch and without a remote-equipped key. This guide walks through waking that latent feature: programming a four-button remote, confirming with a multimeter that the car already sends a release pulse down the harness, running a single wire back to the trunk, and swapping the manual latch for the powered EX/Si assembly while keeping the trunk-ajar sensor working. Because the release signal is verified before you commit to the more expensive latch, the project fails cheaply if your particular car turns out not to be provisioned. The steps assume an LX sedan; a coupe is untested. Adapted from a community writeup by FlowMix on 8th Civic (https://www.8thcivic.com/threads/diy-lx-sedan-remote-trunk-release-upgrade.653227/), including corrections from the follow-up discussion.
Acura RDX (1G) Center Console Top Cover Removal and Cup Holder Replacement
This guide covers lifting off the top cover of the center console on the first-generation Acura RDX (2007-2012) and, if needed, swapping out the cup holder that mounts underneath it. Removing this cover exposes the console interior, which is the starting point for jobs such as servicing the console courtesy light and its wiring. The cover is retained entirely by concealed plastic clips, so the whole job is done by hand with a couple of trim tools once the shift assembly is out of the way. Because SRS airbag wiring and other circuits run through the console, disconnect the battery before you begin. Throughout, driver side and passenger side are described relative to the vehicle, not to the direction you happen to be facing while working. Adapted from a community writeup by 737 Jock on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/diy-remove-top-console-cover-also-replace-cup-holder-803114/), including corrections from the follow-up discussion.
Acura TL (1G) Factory Head Unit Removal and Reinstallation
This guide covers removing and reinstalling the factory head unit in the first-generation Acura TL (1999-2003). Owners usually do this to read the radio's serial number for an anti-theft code lookup, to drop in a replacement OEM stereo, or to install an aftermarket unit. The work is simple: release the wood-grain dash bezel, unbolt the radio's mounting frame, and unplug the factory harness. Most people finish in roughly half an hour with little more than a screwdriver. Because pulling the head unit is often paired with a battery disconnect, this guide also covers the five-digit reactivation code and the wiring-harness adapter an aftermarket stereo requires. Adapted from a community writeup by UnsanePyro on AcuraZine (https://acurazine.com/forums/1g-tl-problems-fixes-118/how-replace-head-unit-559293/), including corrections from the follow-up discussion.
Acura Integra Indiglo Electroluminescent Gauge Face Install
Indiglo faces replace the flat printed panels of the Integra instrument cluster with thin electroluminescent sheets that light up evenly across the speedometer, tachometer, and secondary gauges. The kit includes four gauge faces, a small inverter that steps up voltage to drive the panels, and a dial that adjusts brightness or color. This guide covers pulling the cluster, splitting it open without cracking the trim, seating the new faces so the needles still sweep freely, routing the panel leads out of the housing, and powering the inverter from a parking-light-switched 12V feed. It applies to the Acura Integra and the same approach carries over to other Honda/Acura clusters with a similar snap-together bezel. Take your time on the face fitment: a face that sits proud of the dial will drag a needle and throw off the reading. Adapted from a community writeup by MorningZ on Team Integra (https://www.team-integra.net/threads/indiglo-gauge-install.342473/), including corrections from the follow-up discussion.
Third-Generation Acura Integra Exhaust Header Replacement (B18B1)
This guide covers swapping the factory cast exhaust header for an aftermarket tubular unit on a third-generation Acura Integra fitted with the B18B1 engine. Upgrading the header is a common early modification that improves exhaust flow and frees the engine to breathe more easily. The job involves working from both above and below the vehicle, transferring the oxygen sensor to the new part, and torquing the header to the engine correctly so the gasket seals without warping. No engine internals are disturbed, so a patient home mechanic with jack stands and a torque wrench can complete it in an afternoon. The procedure applies to the LS, GS, and RS trims that share the non-VTEC B18B1 long block. Adapted from a community writeup by MorningZ on Team Integra (https://www.team-integra.net/threads/g3-header-install.342560/), including corrections from the follow-up discussion.
Honda B-Series Valve Cover Gasket and Cam Seal Replacement (B18B)
A weeping valve cover gasket or a leaking camshaft seal is a common source of oil seepage on Honda and Acura B-series engines, and both can be renewed in an afternoon with basic hand tools. This guide covers the job on a non-VTEC B18B (as fitted to the 1996 Integra LS) and applies broadly to related B-series heads, though VTEC engines carry a different number of fasteners at several points and those differences are called out along the way. Replacing these seals stops oil from tracking down the head, keeps the engine bay clean, and prevents oil from reaching the spark plug tubes. Adapted from a community writeup by cheezthis on Team Integra (https://www.team-integra.net/threads/cam-seal-and-valve-cover-gasket-replacement.342608/), including corrections from the follow-up discussion.
Honda Fit (GD): Injen Cold Air Intake Installation
This guide covers fitting an Injen cold air intake to the first-generation Honda Fit (GD). The Injen kit is a convertible design that can be run as a full-length cold air setup, with the filter tucked low behind the front wheel arch for cooler intake air, or reassembled as a short ram unit. On the Fit the cold air routing requires the front bumper cover to come off and a small section of wheel-well liner to be trimmed, which makes this more involved than a typical bolt-on filter. Owners running the intake report a slightly leaner air/fuel trim, consistent with the extra airflow, and the kit is CARB exempt in both configurations. This procedure applies to the Fit's 1.5-litre L15A engine in the GD chassis. Adapted from a community writeup by dmxsoulja3 on FitFreak (https://www.fitfreak.net/forums/fit-engine-modifications-motor-swaps-ecu-tuning/8460-diy-installing-injen-cai.html), including corrections from the follow-up discussion.
Honda Fit Headlight Disassembly: Opening the Sealed Housing With Oven Heat
This guide covers splitting a Honda Fit headlight into its clear lens and black housing so you can paint the internals, retrofit projectors, or clean out debris, then sealing it back up. The two halves are joined by a continuous bead of rubbery butyl, which grips hard when cold but goes soft and stretchy with gentle warmth, so the whole job hinges on heating the assembly evenly before you try to pry. It applies to the GD and GE generation Fit and to similar sealed acrylic-lens housings on other Hondas. Do this work with the headlight already off the car, and expect the process to reward patience far more than force. Adapted from a community writeup by smeister on FitFreak (https://www.fitfreak.net/forums/fit-interior-exterior-illumination/17218-diy-taking-apart-headlight.html), including corrections from the follow-up discussion.
Soldering Automotive Wire Splices: A Practical DIY Method
This guide shows how to make clean, durable soldered splices for automotive wiring on Honda and Acura projects, from repairing a factory harness to wiring an engine swap, gauges, an OBD conversion, or lighting. Poor connections such as T-taps and loose crimps are a common cause of intermittent faults, and they are especially hard on sensitive circuits like alarms and engine management. A properly soldered and insulated joint costs very little to make and can easily outlast the car. The complete kit of tools and supplies runs under about $50, and the technique takes only a couple of hours of practice to get right. The method below favors low cost, speed, and reliability for everyday installs rather than aerospace-grade overkill, and it folds in the alternative approaches and cautions raised in the discussion so you can decide what suits your job. Adapted from a community writeup by suspendedHatch on HondaSwap (https://www.hondaswap.com/threads/soldering-tutorial.70703/), including corrections from the follow-up discussion.
M3-Style Side Mirror Install on the Acura CL / 94-97 Honda Accord
M3-style side mirrors are a popular aftermarket upgrade for the first-generation Acura CL and the closely related 1994-1997 Honda Accord, swapping the factory door mirrors for a sleeker BMW-inspired housing that usually includes integrated LED marker and turn-signal lights. Because these mirrors are a universal-fit part rather than a direct OEM replacement, the job is not fully bolt-on: the supplied bracket lines up with only one factory hole, so you drill fresh mounting points, and the mirror's motor and LED leads have to be matched to the car's harness by trial and error. This guide walks through removing the stock mirror, test-fitting and drilling the new bracket, mounting the mirror, and wiring both the adjustment motors and the LED lighting. Plan for the wiring to take the most time, since it is the fiddliest part of the install. Adapted from a community writeup by klepto on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/m3-side-mirrors-install-470657/), including corrections from the follow-up discussion.
Honda Fit (GE8) Custom Cold-Air Intake with Velocity Stack
This guide covers building a low-cost custom cold-air intake for the second-generation Honda Fit (GE8), centered on a velocity stack that sharpens throttle response and a relocated inlet that pulls cooler air from the pocket behind the headlight. The factory filter and its long run of tubing are removed and replaced with a cone filter, a machined aluminum velocity stack, and a stack of size adapters that let mismatched pipe diameters mate cleanly and hold a true round shape under clamp pressure. A fabricated heatshield finishes the job, walling the filter off from radiant engine heat so the incoming charge stays cooler. The aim is crisper part-throttle and low-to-mid-range response plus a modest efficiency gain rather than large peak-power numbers. It suits owners who are comfortable sourcing generic couplers and cutting a simple sheet-metal panel. Adapted from a community writeup by kurisux92 on FitFreak (https://www.fitfreak.net/forums/2nd-gen-ge8-specific-fit-engine-modifications-motor-swaps-ecu-tuning-sub-forum/72430-so-i-got-bored-my-diy-intake-pics-inside.html), including corrections from the follow-up discussion.
Acura 1G CL Front Speaker Grille Removal and Fabric Cleaning
The cloth-faced front speaker grilles in the first-generation Acura CL tend to darken and pick up stubborn stains over years of use, leaving the interior looking tired even when the rest of the cabin is clean. Rather than replacing the covers or resorting to fabric dye, you can restore the original fabric with an inexpensive foam upholstery cleaner and a little patience. This guide covers popping the grilles free of their clips, deep-cleaning the fabric without stretching or picking it, and reseating the covers correctly so they sit flush again. The whole job costs only a few dollars and leaves most of a can of cleaner for other trim. It applies to the fabric-covered door and pillar speaker grilles on the 1G Acura CL and similar Honda/Acura interior trim of the era. Adapted from a community writeup by Gaujo on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/diy-speaker-grill-removal-cleaning-478559/), including corrections from the follow-up discussion.
Front Bumper Cover Removal: 1st-Gen Acura CL (1997)
This guide covers taking the front bumper cover off a first-generation Acura CL (1997 2.3CL and 3.0CL). Pulling the cover is the gateway to a long list of front-end work: swapping to blacked-out or HID headlights, refitting or replacing the corner turn signals, relocating fog lights, and reaching the headlamp assemblies or radiator support. The cover is retained by a pair of Phillips screws in each fender liner, two 12mm bolts hidden behind each turn signal, and two push clips along the lower lip. Once those are freed, the cover and the foam impact absorber mounted behind it lift away as a unit. Expect the refit to take longer than the removal, and line up a second person to help with it. Adapted from a community writeup by Orlando3.0 on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/diy-bumper-removal-finally-pictures-479502/), including corrections from the follow-up discussion.
Paintless Dent Removal Using Heat and Freezing Air Duster Spray
This guide covers a low-cost method for popping out a shallow to medium dent on a steel body panel without paint work or filler, relying only on thermal expansion and contraction. Heating the metal makes it expand, and then chilling it suddenly with the liquefied propellant from an inverted air-duster can forces a rapid contraction that can snap the panel back toward its original shape. It suits accessible, unsupported panels such as doors, fenders, and quarter panels on Acura and Honda vehicles (and cars generally), and works best on a fresh dent, ideally addressed within about a month and on a warm day so the metal starts hotter. Treat it as a cheap first attempt rather than a guaranteed fix: results vary with panel shape and dent depth, and at least one attempt in the source discussion produced no movement at all. Adapted from a community writeup by Eband27 on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/diy-easy-medium-large-dent-removal-486833/), including corrections from the follow-up discussion.
Honda Civic (10th Gen) LED Interior Light Upgrade with DIY Reflectors
Swapping the factory interior bulbs of a 10th-generation Honda Civic for LEDs is a quick brightness upgrade, but LEDs throw a tighter, more directional beam than the incandescent bulbs they replace, so light output around the glove box, dome (roof) lamp, and trunk can look uneven. This guide covers the LED swap itself plus a set of cheap home-made reflectors that recover spread and make the cabin noticeably brighter, along with an optional trick to soften the vanity mirror lamps if the new LEDs are too harsh. The reflectors are made from ordinary aluminum foil, so total cost is minimal and the work needs no special tools. The methods were demonstrated on a 10th-gen Premier but transfer to other trims and are broadly applicable to similar fittings on other vehicles. Adapted from a community writeup by M8TJT on Civinfo (https://www.civinfo.com/threads/how-to-improving-interior-lights.397882/), including corrections from the follow-up discussion.
Honda Civic Door Card Removal and Auto-Fold Mirror Module Wiring
This guide covers removing the front door trim card on a tenth-generation Honda Civic and wiring in an auto-fold mirror control module. Once fitted, the module folds the door mirrors on a single press of the lock button and unfolds them on a single press of unlock, giving a quick visual confirmation that the car is secured. While later Civics can fold the mirrors on a double press of the lock button, this modification triggers the action from a single press and can be applied to variants that lack the factory feature. The work divides into two parts: safely detaching the door card to reach the harness, and identifying the mirror-motor and lock/unlock signal wires so the module can be tapped in and powered from the cabin fuse box. Repeat the whole procedure on both doors. Adapted from a community writeup by M8TJT on Civinfo (https://www.civinfo.com/threads/how-to-remove-drivers-door-card-and-fit-autofold-mirror-module.410610/), including corrections from the follow-up discussion.
Honda Fit (GE8) Custom Dash-Mounted Phone Cradle
This guide converts a throwaway windshield suction mount into a permanent, factory-clean phone cradle on the center dash of a second-generation Honda Fit (GE8, roughly 2009-2013). Instead of leaving a suction cup on the glass, you fasten just the cradle arm through the radio/HVAC trim panel at a point below the windshield line and in line with the climate controls, so the phone sits in your sightline, stays within easy reach, and blocks none of the vents. The whole job costs under two dollars in hardware, leaves only two small holes in the trim, and can be finished in about half an hour; hardwiring a charger outlet behind the radio is an optional add-on. Adapted from a community writeup by WhiskeySix on FitFreak (https://www.fitfreak.net/forums/2nd-gen-ge8-specific-fit-interior-modifications-sub-forum/63838-diy-custom-phone-mount-honda-fit.html), including corrections from the follow-up discussion.
Dual-Piston Front Brake Upgrade for the 1G Acura CL (Legend Calipers, Prelude Rotors)
This guide covers converting the single-piston front brakes on a first-generation Acura CL (the 4-lug 2.3CL) to a larger dual-piston setup using off-the-shelf parts. The calipers come from a 1994 Acura Legend GS 3.2L and are ordered as loaded Raybestos units (RC10627 and RC10628), so they arrive with pads, hardware, and their own mounting brackets and bolt straight to the CL knuckle. They are paired with the larger 11-3/32" (11.5") front rotors used on a 1996 Prelude VTEC. The result is a stronger, more confident front end without custom fabrication. The write-up folds in the follow-up discussion, most importantly a critical left/right orientation trick that determines whether the calipers can be bled at all, plus notes on the Legend proportioning valve and the option to renew the flexible brake lines at the same time. Adapted from a community writeup by jfkhan on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/dual-piston-caliper-upgrade-diy-685351/), including corrections from the follow-up discussion.
Acura 1G CL Clutch Slave Cylinder Replacement and Bleed
A failing clutch slave cylinder on the first-generation Acura CL commonly shows up as a hydraulic leak and a pedal that sinks or hangs near the floor after the clutch is held disengaged for a short time. Because the slave sits at the transmission and is fed by a rigid hydraulic pipe from the master cylinder, replacing it is a self-contained job that restores firm pedal feel and clean shifting without opening the transmission. This guide covers removing the leaking unit, fitting a new one, and gravity-bleeding the clutch line so no air remains, along with the torque figures and a workaround for the notoriously easy-to-strip line fitting. It applies to the manual-transmission 1G CL and shares its hydraulic layout with related Honda/Acura clutch systems of the era. Adapted from a community writeup by Tehvine on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/diy-clutch-slave-cylinder-97-a-689465/), including corrections from the follow-up discussion.
Honda Fit (GE8) Door Panel Reupholstery and Aftermarket Speaker Mounting
This guide covers two interior jobs on the second-generation Honda Fit (GE8, roughly 2009-2013): swapping the factory door speakers for an aftermarket set and re-covering the door-card insert with a fabric you actually like instead of the coarse original cloth. Both jobs start by pulling the same door panel, so it makes sense to tackle them together. Expect the reupholstery to be the demanding part: the insert has a deep hollow and a raised hump that stiff materials refuse to wrap, and several people in the source thread abandoned the fabric swap after their material wrinkled or lifted. Success hinges on picking a genuinely stretchy fabric and taking your time on the lower corner. The speaker side is more forgiving and rewards you with better sound while keeping a factory-style plug connection. Adapted from a community writeup by mdbrich on FitFreak (https://www.fitfreak.net/forums/2nd-generation-ge8-specific-diy-repair-maintenance-sub-forum/31439-diy-2009-door-fabric-speaker-grill-cutouts.html), including corrections from the follow-up discussion.
Honda S2000 Convex Mirror Glass Installation
Convex door mirrors widen the rearward field of view and shrink the over-the-shoulder blind spot compared with the flat factory glass, which is why many owners switch to them. This guide covers replacing the standard glass on a Honda S2000 (AP1/AP2) with aftermarket convex glass, for example the popular ITG-style blue units. If you buy the convex glass already fitted into a replacement plastic frame you can skip the heating and glass-transfer steps and simply swap the assemblies; buying loose glass is cheaper but requires softening the plastic holder to move the glass across. The job needs no special tools and can be finished in under an hour per pair. Adapted from a community writeup by thejohnremus on S2KI (https://www.s2ki.com/forums/s2000-modifications-parts-193/how-install-convex-mirrors-503104/), including corrections from the follow-up discussion.
Hardwiring a Valentine One Radar/Laser Detector to the Civic Interior Light
This guide covers a clean, hidden power feed for a Valentine One (V1) radar/laser detector mounted high on the windshield, centered just below the rear-view mirror, in a Honda Civic. Running the supplied cigarette-lighter cord all the way up the dash to a mirror-height detector is untidy, so this install instead taps a switched 12V source at the front interior (dome) light and routes a Direct Wire adapter with an RJ11 lead to the detector. The result is a factory-looking installation with no visible power cord. The same power-tap and cable-routing approach adapts to other small windshield-mounted devices such as GPS units or standalone laser detectors. Adapted from a community writeup by eNf on Civinfo (https://www.civinfo.com/threads/how-to-wire-in-valentine-one-radar-laser-detector.5892/), including corrections from the follow-up discussion.
Honda Civic (FK/FN) Front Grille Swap Without Breaking Clips
This guide covers swapping the front grille on the 8th-generation Honda Civic (FK/FN hatchback, 2006-2011) from one design to another while keeping every retaining clip intact. It is commonly used to replace the closed perspex/glass grille fitted to standard cars with an open mesh sports grille, which improves airflow to the radiator and gives the car a Type R style front. On automatic models the standard grille often has open cooling holes, while manual cars typically have those holes blanked off from behind. The workshop manual tells you to remove the entire front bumper, but the job can be completed in place in as little as fifteen minutes with patience and slim wrists. Doing it yourself also avoids a large labour charge: owners in the thread paid under a hundred pounds for the part against dealer quotes of several hundred. Adapted from a community writeup by docholiday on Civinfo (https://www.civinfo.com/threads/how-to-change-grill-without-breaking-any-clips.24334/), including corrections from the follow-up discussion.
Honda Civic 2.2 i-CTDi Aftermarket HID Headlight Conversion (H7)
This guide covers retrofitting an aftermarket H7 HID (xenon) kit to the headlights of a Honda Civic 2.2 i-CTDi (also badged 2.2 cdti / ICDTI, including the Type S GT), and the same method transfers to other Civics of the era that use an H7 low-beam bulb. The reward is a significant jump in light output over the standard halogens for a modest parts cost. Slim-line ballasts are strongly preferred here because the diesel engine bay leaves very little spare room, especially on the driver's side where the coolant bottle sits directly over the headlight access cap. The work itself is not mechanically difficult, but it is fiddly: the retaining clips and dust caps must often be worked partly by feel. Budget extra time and patience for the driver's side. Note that H7R bulbs exist specifically for reflector-style housings, so confirm your housing type before ordering. Adapted from a community writeup by Jamesallonby on Civinfo (https://www.civinfo.com/threads/how-to-guide-diy-aftermarket-hids-2-2-cdti.26657/), including corrections from the follow-up discussion.
Honda Civic Rear Brake Pad Replacement
This guide covers renewing the rear disc brake pads on a Honda Civic, a job most owners can complete at home with a modest tool set and save the labour a dealer would charge for. The rear calipers use a threaded, self-adjusting piston that must be screwed back into its bore rather than pushed straight in like the front, so a rewind tool is the one specialist item you need. The procedure applies to the eighth-generation Civic hatch and saloon and is broadly similar to other Honda models that use a screw-in rear piston. The write-up also folds in the most important lesson from the follow-up discussion: new pads should never be forced or hammered home. If they will not slide freely, the fault is a dirty or rusted pad carrier, and cleaning that carrier is what prevents dragging brakes, uneven wear and squeal. Set aside an unhurried morning, work one side at a time, and keep brake fluid off any paintwork. Adapted from a community writeup by Unknownsoldier on Civinfo (https://www.civinfo.com/threads/changing-rear-pads-how-to.27431/), including corrections from the follow-up discussion.
Honda Civic Lowering Spring Replacement (Front and Rear)
This guide covers swapping the factory coil springs for a lowering set (such as Eibach, typically a 25-30mm drop) on the eighth-generation Honda Civic, including the 2.2 i-CTDi. It walks through both the straightforward rear coils and the more involved front struts, which have to come off the car and be stripped on a bench under spring compressors. The result is a moderate drop that sharpens the stance and, according to owners, can actually take the crash out of speed bumps rather than harshening the ride. The work is within DIY reach using ordinary hand tools, but two stages, freeing the anti-roll bar drop links and cracking the frequently seized 18mm strut top nut, are notorious for eating hours, so patience, plenty of penetrating fluid and ideally a second person are essential. Budget for a geometry alignment afterwards to reset camber and toe. Adapted from a community writeup by coste1l on Civinfo (https://www.civinfo.com/threads/how-to-change-the-springs.39302/), including corrections from the follow-up discussion.
Honda Fit (GK) Bi-Xenon Projector Headlight Retrofit
This guide covers retrofitting true bi-xenon projectors into the factory halogen headlights of a third-generation Honda Fit (GK). The stock Fit runs a single dual-filament bulb for both low and high beam, so the projector chosen here uses a solenoid to shift between the two beam patterns. Retrofitting a projector with a proper cutoff shield produces a sharp, focused beam that lights the road without the scattered glare that comes from simply dropping HID bulbs into an unmodified reflector housing. Expect to surrender the car for a couple of days: the housings must be baked open, the internal shield cut out, the shrouds and bowl painted, and the projectors mounted, wired, and carefully aimed. Plan the work around a daily driver accordingly. Adapted from a community writeup by Kdawgz on FitFreak (https://www.fitfreak.net/forums/3rd-gen-gk-specific-fit-exterior-modifications-jdm-styling-sub-forum/88591-diy-projector-headlights.html), including corrections from the follow-up discussion.
Honda S2000 Brake Fluid Flush by Gravity Bleeding
This guide covers a full brake fluid flush on the Honda S2000 using the gravity-bleed method, in which the fluid is allowed to drain out under its own weight rather than being forced through with the brake pedal. No helper and no pedal pumping are required, which makes it a one-person job, but it is slower than pressure or pedal bleeding. The payoff is fresh, low-moisture fluid and a firm pedal. Because brake fluid absorbs moisture from the air and loses boiling resistance over time, periodic flushing restores braking performance, especially for cars seeing track use. The same procedure applies to other Honda and Acura models such as the RSX, though the wheel bleeding order differs by model and should be confirmed for your car. Adapted from a community writeup by Maxima02 on Club RSX (https://www.clubrsx.com/threads/diy-s2000-brake-fluid-change-gravity-method.540550/), including corrections from the follow-up discussion.
Building Custom LED Interior and Trunk Bulbs for the Acura RSX
This guide covers fabricating your own LED replacements for the interior and trunk lamps of an Acura RSX instead of buying pre-made bulbs. Rather than dropping in a finished unit, you solder individual LEDs into a small cluster, size a current-limiting resistor to the car's electrical system, and mount the assembly so it fits the original lamp housing. The payoff is brighter, longer-lived, lower-draw lighting in whatever color and intensity you choose, at a fraction of the cost of retail LED bulbs. The work is well within reach for anyone comfortable with a soldering iron and basic electronics math, and the same approach transfers to dome, map, and license-plate lamps. Read the electrical section carefully first: LEDs are current-driven and polarity-sensitive, so a correct resistor and correct orientation are what separate a clean install from a burned-out cluster. Adapted from a community writeup by lactard on Club RSX (https://www.clubrsx.com/threads/diy-led-bulbs.635624/), including corrections from the follow-up discussion.
Acura RSX Headlight Blackout: Oven-Bake, Separate, and Paint the Internals
The headlight blackout mod darkens the reflector and trim visible through an RSX headlight lens without tinting the outer lens itself, giving the front end a menacing look while keeping light output legal-ish and the exterior glass clear. The trick is that the lens is bonded to the housing with a heat-softening butyl-style sealant, so the assembly is warmed in an oven until the seal releases, the halves are pried apart, the internal pieces are unbolted, masked, and sprayed satin black, and everything is bonded back together with a second bake. It applies to the sealed-beam-style composite headlights on the Acura RSX / Honda Integra DC5. Expect to sacrifice a set of headlights if you rush the prying or overheat the plastic, so budget time and patience. Adapted from a community writeup by turbo_this on Club RSX (https://www.clubrsx.com/threads/diy-headlight-blackout.804567/), including corrections from the follow-up discussion.
Acura RSX Front Tow Hook Installation
This guide covers bolting an aftermarket front tow hook to the Acura RSX (DC5). The hook attaches to the reinforcement bar (rebar) behind the front bumper cover, giving both a functional recovery point and a common cosmetic touch. The job needs only basic hand tools and a drill, so it is well within reach of a first-time DIYer. Because you are drilling a structural crash beam and working around the bumper's marker-light wiring, take care with placement and disconnect the bulbs before the cover comes off. A bolt-on strap-style hook is a lower-profile alternative that mounts the same way. Adapted from a community writeup by minnSi on Club RSX (https://www.clubrsx.com/threads/diy-front-tow-hook.810599/), including corrections from the follow-up discussion.
BuddyClub Extended Front Lower Ball Joint Installation (RSX / EP3 Civic Si)
BuddyClub extended ball joints replace the front lower ball joints on the Acura RSX (DC5) and 2002-2005 Honda Civic Si (EP3) with units that relocate the lower control arm's outer pivot roughly three-quarters of an inch below stock. On a lowered car the factory geometry leaves the control arms angled upward at rest, which produces excess positive camber and bump steer as the suspension compresses; dropping the ball joint restores a flatter arm angle and tames that behavior. This guide covers pulling the front knuckle, separating the old ball joint, having the new one pressed in, and reassembling to factory torque, using the front spindle-out procedure shared by these chassis. The new joint must be installed with a proper ball joint press (a shop or a rented kit), never driven in with a hammer. The torque figures given here are taken from the 2002-2003 Civic Si service manual. Adapted from a community writeup by j21857 on Club RSX (https://www.clubrsx.com/threads/diy-buddyclub-extended-ball-joint-install.854192/), including corrections from the follow-up discussion.
DIY Red Type-R Style Emblem Conversion Using Outdoor Vinyl
This budget alternative recreates the look of a red Type-R badge without paying the high price of genuine emblems, which can run well over $100 a set and are a known theft target. Instead of buying new badges, you reface the car's existing Honda emblems by wrapping the visible face in weatherproof colored vinyl, so the metal tabs and mounting points stay original and the badges bolt straight back on. The technique covers both the front and rear emblems; the rear badge is the simpler of the two and is a good place to practice before doing the front, which needs a thin plastic backer to hold its shape. Expect to spend only a few dollars on the vinyl and adhesive remover if you already own basic cutting tools. Adapted from a community writeup by tonyli on Club RSX (https://www.clubrsx.com/threads/diy-cheapest-red-emblem-mod-may-be.864540/), including corrections from the follow-up discussion.
Acura RSX Rear Hatch Lock Actuator Replacement
This guide covers replacing the rear hatch lock actuator on the Acura RSX (DC5, 2002-2006, including Type-S). The actuator is the small electric motor that latches and releases the tailgate on command from the key fob. When it wears out the hatch stops responding to the remote, and you may notice the exterior lights no longer flash and the horn stays silent when you press lock, because the car still reads the hatch as open. The repair requires removing a few interior trim panels at the rear of the hatch to reach the unit, then swapping it for a new one. It is an inexpensive, low-risk job that most owners complete in well under an hour with basic hand tools. Adapted from a community writeup by dstanced on Club RSX (https://www.clubrsx.com/threads/diy-rsx-trunk-hatch-actuator-replacement.926809/), including corrections from the follow-up discussion.
Acura RSX Camber Kit Installation (Ingalls Adjustable Rear Arms and Front Cam Bolts)
This guide covers fitting an Ingalls camber-correction kit to the Acura RSX (DC5, 2002-2006) to restore usable alignment geometry after the car has been lowered. Dropping the ride height pulls the tops of the wheels inward, producing excess negative camber that quickly wears the inner edges of the tires. The factory RSX suspension offers no camber adjustment, so a kit of some kind is required to dial it back. This kit replaces the fixed rear upper control arms with adjustable-length units and substitutes eccentric cam bolts for the front upper strut bolts, giving roughly two degrees of correction in either direction. The rear work is simple; the front cam bolt is the fiddly part because clearances around the strut are tight and the eccentric bolt tends to spin out of position while you torque the nut. Because the kit cannot be set accurately by eye, budget for a professional alignment immediately after the install. Adapted from a community writeup by victor.s on Club RSX (https://www.clubrsx.com/threads/ingalls-camber-kit-install.193417/), including corrections from the follow-up discussion.
Custom RSX Switch Panel for a Honda S2000 Push Button
This project builds a custom switch panel for the Acura RSX (DC5) that houses a genuine Honda S2000 push button in place of the factory blanks. The work is mostly bodywork and finishing: two blank trim inserts are skimmed with filler, shaped, drilled, sanded, primed, and painted so the button sits flush in a seamless, factory-looking face. Note that this is a cosmetic and accessory install, not an ignition upgrade. Because the RSX key carries an immobilizer chip, the button does not replace the ignition and the car is still started with the key. While the panel is out, the cruise-control switch can be reconnected and hidden so cruise runs entirely from the steering-wheel controls. The method suits cars without factory foglights, which already carry one extra blank; a second blank can be ordered from Acura, and the mounting location is flexible (for example the mirror-control or hazard-switch slot). Adapted from a community writeup by Krisen Type-S on Club RSX (https://www.clubrsx.com/threads/diy-guide-custom-s2000-button-dash-panel.249520/), including corrections from the follow-up discussion.
Making the Speedometer and VSS Work After a 2005-2006 K-Series Transmission Swap (EG/EK/DC2)
When a 2005-2006 K-series drivetrain is dropped into an older Honda or Acura chassis, the speedometer, tach, and several gauges frequently stop working. The cause is the gearbox itself: the 05-06 unit uses an electronic speed sensor whose pulse frequency is far higher than the 2002-2004 sensor it replaced, so an older cluster and an unmodified ECU cannot read it. This guide covers getting a fully functional speedometer and VSS-dependent features back after fitting the later transmission into an EG or EK Civic or a DC2 Integra. It is a K-Pro (Hondata) based method and is not plug-and-play; it assumes you can read ECU pinout diagrams and are comfortable relocating individual wires inside the harness connectors. Follow it only if you have both the older and 05-06 wiring references in hand. Note that the fix corrects the signal on the way into the ECU; the output the ECU sends onward to the cluster stays standard once Hondata's internal converter is present. Adapted from a community writeup by crxsirb16a1 on K20A.org (https://www.k20a.org/threads/05-tranny-and-vss-in-eg-ek-dc2-write-up.24320/), including corrections from the follow-up discussion.
Angel Eye (Halo Ring) Headlight Retrofit for the 8th-Gen Honda Accord
Angel eyes (halo rings) give the 8th-generation Honda Accord's headlights a distinctive illuminated-ring look similar to European luxury cars. This guide covers retrofitting a pair of aftermarket halo rings and their ballasts into the factory headlight housings, wiring the rings into the parking-light circuit so they glow whenever the marker lights are on. The job requires opening the sealed headlight assemblies in an oven, bonding the rings inside, resealing the housings, and splicing the ballast leads into the car's wiring, so it suits an installer comfortable with automotive wiring who accepts the real risk of damaging a housing with heat. Plan to remove the front bumper and both headlights and to work carefully with a high-temperature sealant. Adapted from a community writeup by orion on DriveAccord (https://www.driveaccord.net/threads/diy-angel-eyes-on-8th-gen.28077/), including corrections from the follow-up discussion.
Acura CL Footwell Accent Lighting: Wiring LED Tubes to Switch With Your Interior Lights
This guide covers adding LED accent tubes to the driver and passenger footwells of a first-generation Acura CL and wiring them so they turn on automatically with the car's lighting rather than from a plug in the cigarette lighter. You choose one of two behaviours: tie the tubes to the head unit's dimmer-controlled illumination feed so they glow whenever your parking lights, headlights and dash lighting are on, or tie them to the dome-light circuit so they act like factory courtesy lamps that come on as you open a door. The wiring is simple 12 V accessory work and the same approach carries over to other lights in the cabin. The parts are inexpensive, and the discussion covers cheaper tube options, a manual kill switch, and the grounding mistakes that most often stop these installs from working on the first try. Adapted from a community writeup by 97BlackAckCL on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/diy-footwell-lighting-hardwired-illuminate-interior-lights-489404/), including corrections from the follow-up discussion.
Running New Speaker Wire Into the Doors Without Drilling (1G Acura CL)
Upgrading the door speakers usually means finding a clean path for the new wiring, and many people assume the door must be drilled or that the wire has to be fished the full length of the flexible rubber boot with a coat hanger. Neither is required. This guide routes new speaker wire from the cabin into each door using the existing factory pass-through and a small, taped-over slit in the door boot, leaving the weather seal essentially intact and the result hidden. It applies to the first-generation Acura CL and to similar Honda/Acura doors that use the same connector clip and concertina boot between the body and the door edge. Follow the same sequence on both sides; the driver side is straightforward, while the passenger side is more cramped and benefits from removing a trim piece for access. Adapted from a community writeup by fliplyricist1 on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/easy-way-run-new-speaker-wires-into-your-doors-%2Adiy%2A-493905/), including corrections from the follow-up discussion.
Acura CL (1G): Adding Amplified Subwoofers to the Factory Bose System
This guide covers adding aftermarket subwoofers and an amplifier to a first-generation Acura CL while keeping the factory Bose head unit in place. Instead of replacing the stereo, it taps the rear speaker outputs through an inexpensive line out converter, so you keep the original dash and controls while gaining amplified bass. It walks through the two jobs that make or break this kind of install: running a heavy power cable cleanly from the battery through the firewall to the trunk, and pulling the signal, remote, and power leads through the body without pinching or exposing them. The same wire-routing approach applies to most sedans with a similar door-sill-to-rear-strut path. Adapted from a community writeup by Myxomatosis on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/diy-subwoofers-using-stock-setup-how-run-power-cables-687982/), including corrections from the follow-up discussion.
Honda Civic Ambient Footwell Lighting Install with Door-Triggered Dimming
This guide adds soft ambient footwell lighting to a Honda Civic and wires it into the interior dome light circuit so the LEDs behave exactly like the factory courtesy lamps: they come up when a door opens and fade out afterward, and they remain fully compatible with the car's automatic dimming. Because the feed is taken from the dome lamp rather than a constant supply, the footwell lights are only active when the interior lights are, which keeps the install simple and avoids a separate door-trigger wire. The chosen light source is a pair of superflux LED boards, each carrying three LEDs on a thin metal plate; they draw very little current, run cool, sit flat under the dash, and stay bright enough to read as ambient light even in daylight. Plan on roughly an hour. This work involves prying interior trim, drilling a small pass-through, routing wire behind the dash and door seal, and a little soldering, which is why it rates as a moderate job rather than a beginner one. Adapted from a community writeup by ante00 on Civinfo (https://www.civinfo.com/threads/ambient-lighting-easy-install.7174/), including corrections from the follow-up discussion.
Honda Civic Horn Upgrade: Fitting Aftermarket Twin Horns
This guide covers replacing the weak factory horns on a Honda Civic with a louder aftermarket twin-horn set, such as the Stebel Magnum electromagnetic high/low pair. Because a high-output horn draws more current than the standard circuit is intended to carry, the upgrade uses the relay supplied in the horn kit, wired so the original alarm-triggered horn function is preserved. The work involves dropping the front bumper to reach both horn locations, mounting the new units on the reused factory brackets, running the relay wiring, and tapping the existing horn-button signal without cutting into the loom. Lower-draw replacement horns can instead be spliced straight onto the standard wiring, and that simpler path is noted in the tips. The procedure applies to Honda Civic models of this era (including ES and Type S trims) that have twin front-mounted horns behind the bumper. Adapted from a community writeup by campbell_p30 on Civinfo (https://www.civinfo.com/threads/how-to-upgrade-the-horn.8362/), including corrections from the follow-up discussion.
Honda Civic (FN2) Front Anti-Roll Bar Drop Link Replacement
A knocking or clunking noise from the front suspension over bumps and at low speed on the 2006-2011 Honda Civic (FN2), including the Type R and the 2.2 i-CTDi diesel, is very often a worn front anti-roll bar drop link. The link is a short strut with a ball joint at each end that ties the anti-roll bar to the suspension strut; once its ball joints develop play it rattles and can eventually detach. This guide covers renewing both front drop links yourself. The mechanical task is quick, but corroded fasteners are the real challenge on these cars, so most of the guidance here is about freeing seized nuts without damage. Dealers have quoted anywhere from around 80 to over 190 pounds for this work, whereas a pair of links and an afternoon in the garage costs a fraction of that. Adapted from a community writeup by voicey on Civinfo (https://www.civinfo.com/threads/how-to-change-drop-links-the-easy-way.61650/), including corrections from the follow-up discussion.
Honda Fit (GE8) C-Pillar Brace Bar Installation
A C-pillar brace is a lightweight bar that spans the interior behind the rear seats, bolting to the two upper seat belt anchor points where the belts mount to the body. Because it clamps to the reused factory anchor hardware, it installs without drilling, cutting, or new fasteners. This guide covers the bolt-on kit sold for the second-generation Honda Fit (GE8, roughly 2009-2013), which arrives as a threaded center bar with an adjustable rod end (end link) at each side. Owners fit it for a modest rear-body tie-together and for its appearance; note that reported handling gains are limited and debated, so treat it primarily as a light chassis accessory rather than a serious stiffening upgrade. The whole job reuses your existing anchor bolts and washers and can be finished in well under an hour with a small set of hand tools. Adapted from a community writeup by kurisux92 on FitFreak (https://www.fitfreak.net/forums/2nd-generation-ge8-specific-suspension-brakes-sub-forum/62948-diy-c-pillar-bar-advanced-speed-shop-type.html), including corrections from the follow-up discussion.
DIY Foam-Core Cargo Cover for the Honda Fit (3rd Gen GK)
The 3rd-generation Honda Fit hatchback ships without a factory cargo cover, and the dealer-accessory piece runs roughly $160 to $230 for what is essentially a fabric-wrapped board. This guide shows how to build a low-profile replacement from a single sheet of black foam-core board for about $11, sized to wedge into the rear cargo recess with no hardware. Once trimmed, the panel hides valuables in the load area and, combined with tinted glass, is nearly impossible to distinguish from a factory piece when viewed from outside or from the cabin. The method covers cutting the panel, building a template for a clean second cut, edging it, and the reinforcement and weatherproofing fixes that owners worked out over time. It applies to the GK-chassis Fit and adapts easily to similar hatchbacks and small SUVs. Adapted from a community writeup by NotBlake on FitFreak (https://www.fitfreak.net/forums/3rd-gen-gk-specific-fit-interior-modifications-sub-forum/85262-11-diy-cargo-cover.html), including corrections from the follow-up discussion.
Wilwood Dynalite 12.2" Big Brake Kit Install (Honda Civic Si / Acura RSX)
This guide covers fitting the Wilwood Dynalite 12.2-inch front big brake kit to the DC5/EP3 platform (Acura RSX and Honda Civic Si), and the process is broadly the same across the Dynalite kit range. The upgrade swaps the factory single-piston setup for lightweight fixed calipers on larger two-piece rotors, giving stronger, more consistent stopping and sharper initial bite (at the cost of slightly more pad noise). Because the 12.2-inch rotor ring is larger than the factory rotor, wheel fitment is tight: plan on a 16-inch minimum wheel and confirm caliper-to-barrel clearance before you start. The job involves opening the hydraulic system, working with a stiff flare-nut fitting, safety-wiring the rotor hardware, and a full bleed, so treat it as safety-critical work. Adapted from a community writeup by Full Frame on Club RSX (https://www.clubrsx.com/threads/diy-wilwood-big-brake-kit-install.578293/), including corrections from the follow-up discussion.
Acura RSX Brake Pad and Rotor Replacement (2002-2005)
This guide walks through a full brake service, pads and optional rotors, on the 2002-2003 Acura RSX, with notes for the 2004-2005 cars where the details differ slightly. Replacing worn pads restores stopping power, while swapping rotors cures pulsing or a scored braking surface. The job is well within reach of a home mechanic with basic hand tools and a safe way to lift the car, and it is straightforward once you have seen how the front and rear calipers come apart, particularly the rear piston, which must be wound in rather than simply pressed. Read through every step before starting so you understand where the front and rear procedures diverge. Adapted from a community writeup by MugsyTheGr8 on Club RSX (https://www.clubrsx.com/threads/diy-brake-pad-and-rotor-replacement.707207/), including corrections from the follow-up discussion.
Koni Sport Cartridge Conversion for EP3/DC5 Front Struts
This guide covers converting the sealed OEM front struts on a 2002 Honda Civic Si (EP3) to Koni Sport 'Yellow' adjustable dampers using their 50mm insert cartridges. Because these are cartridge-type replacements rather than complete assemblies, the original strut housing must be cut open, the worn internals discharged and removed, and the new cartridge drawn into the reused housing with a retaining bolt. The same platform hardware is shared with the Acura RSX (DC5), so the procedure applies to both. Do this to restore front damping with a rebuildable, ride-adjustable unit rather than buying full replacement struts. Expect precise measuring, cutting, and drilling, plus working around a gas-charged damper, so budget time and take it slowly. Adapted from a community writeup by EP3_2002 on Club RSX (https://www.clubrsx.com/threads/diy-koni-strut-cartridge-install.746440/), including corrections from the follow-up discussion.
Acura RSX (K-Series) Fuel Injector Harness Tuck
Once the plastic intake manifold cover is deleted on a K-series RSX, the factory fuel injector wiring is left sitting in plain view, draped across the top of the stock fuel rail where it clutters the engine bay. This guide covers a no-cost way to hide that wiring by unclipping it, stripping off its bulky plastic loom, and routing the individual injector leads down between the injectors so they sit out of sight. It is a purely cosmetic job that keeps the stock rail, so there is no need to buy an aftermarket rail just to clean up the look. The procedure applies to the K20 and K24 engines in the Acura RSX and shares its layout with related K-series intake setups. Adapted from a community writeup by Jamdc5 on Club RSX (https://www.clubrsx.com/threads/diy-fuel-injector-harness-tuck.811425/), including corrections from the follow-up discussion.
Honda Fit (GE8) Gentex GENK41A Auto-Dimming Homelink Mirror Installation
This guide covers replacing the factory rearview mirror in the second-generation Honda Fit (GE8, 2009 onward) with a Gentex GENK41A auto-dimming mirror that adds integrated Homelink transmitters. The result is an OEM-looking mirror that automatically dims to cut headlight glare from vehicles behind you and lets you operate up to three RF devices such as garage doors and gates. The GE8 uses a wedge-style mirror mount, so the Gentex unit slides directly onto the factory base with no adapter or camlock kit required. The work involves removing the stock mirror, mounting the new one, routing a slim wiring harness to the driver-side fuse box, and tapping a constant power source, a switched (ignition) source, and ground. Plan for roughly one to two hours; the supplied self-tapping connectors are the fiddliest part of the job. Adapted from a community writeup by ratedz on FitFreak (https://www.fitfreak.net/forums/fit-diy-repair-maintenance/40480-diy-install-gentex-genk41a-auto-dimming-mirror-homelink.html), including corrections from the follow-up discussion.
Honda Fit (GD3) Clutch Delay Valve Delete via Braided -3 AN Line
The clutch delay valve (CDV) is a small inline restrictor Honda plumbs into the hydraulic clutch line of the first-generation Fit (GD3) to slow how quickly the clutch re-engages. It smooths driveline shock for the sake of longevity but blunts pedal feel and leaves the catch point vague, which is most noticeable when trying to drive smoothly at low speed. This guide removes the CDV on a manual '08 Fit Sport by replacing the factory soft line and valve with a single stainless-steel braided -3 AN hose that runs from the clutch master cylinder down to where the transmission-mounted hard line begins. The payoff is a firmer, more communicative pedal and a clearer engagement point. Note that it does not cure a cold-engagement shudder; the discussion traces that fault to the pressure plate and clutch friction material rather than the valve, so a delete will help you modulate around the shudder but not eliminate it. The same approach suits other manual GD-chassis Fits. One fitment detail stays contested in the thread: the master-cylinder adapter that several builders ordered is a 12mm bubble flare, but the factory hard-line seat is an inverted flare, so confirm the flare type before ordering. Adapted from a community writeup by Willard on FitFreak (https://www.fitfreak.net/forums/fit-diy-repair-maintenance/69651-diy-gd3-clutch-hard-line-remove-line-cdv.html), including corrections from the follow-up discussion.
Acura RSX Energy Suspension Motor Mount (ESMM) Insert Install
Energy Suspension motor mount (ESMM) inserts are polyurethane fillers that pack the voids in the factory front and rear mount bushings, stiffening the link between the engine and subframe. The payoff is less fore-and-aft engine movement and noticeably reduced wheel hop off the line, at the cost of some extra cabin vibration. This guide covers the 2002-2005 Acura RSX and RSX Type-S (Honda Integra DC5) and centers on the garage-friendly subframe-drop approach: rather than unbolting the front mount from the block, whose three bolts are notorious for stripping, you loosen and tilt the subframe down to reach each mount in place. Budget a couple of hours, longer if a race header has to come off first, and work only on a car held up by jack stands. The rear mount is the fussiest part of the job, so leave yourself time and patience for it. Adapted from a community writeup by Randeezle on Club RSX (https://www.clubrsx.com/threads/official-esmm-install-guide-20-steps.269589/), including corrections from the follow-up discussion.
Rear Brake Pad Replacement (Honda Civic Si EP3 / Acura RSX)
This guide covers replacing the rear disc brake pads on a 2002 Honda Civic Si (EP3), a job that restores stopping power once the friction material has worn down. Because the rear caliper on these cars uses a threaded, self-adjusting parking-brake piston, the pads cannot be reached without unbolting and swinging the caliper aside, and the piston must be wound in rather than pressed. The same procedure applies closely to the Acura RSX (DC5), with one difference noted by owners: some bracket fasteners are 12mm on the RSX where they are 10mm on the Civic. Read through the whole procedure before starting, gather the torque figures, and never rely on anything but jack stands to support the car. Adapted from a community writeup by Ju5t Ep3 Pr4ct1c3 on Club RSX (https://www.clubrsx.com/threads/diy-rear-pads-removal-replacement.335319/), including corrections from the follow-up discussion.
Honda Civic Si (EP3) / Acura RSX Front Brake Pad Replacement
This guide covers replacing the front disc brake pads on a 2002 Honda Civic Si (EP3). Follow-up posts confirm the procedure is essentially identical on the Acura RSX (DC5), which shares the same single-piston sliding front caliper design, so RSX and RSX Type-S owners can use the same steps. Worn pads lose stopping power and can score the rotor, so replacing them once the friction material is thin restores braking and protects the rotor surface. Brake work is safety-critical: a mistake here can lead to loss of braking, so work carefully, double-check every fastener against the listed torque values, and confirm firm pedal feel before driving. Adapted from a community writeup by Ju5t Ep3 Pr4ct1c3 on Club RSX (https://www.clubrsx.com/threads/diy-front-pads-removal-replacement.335323/), including corrections from the follow-up discussion.
K20/K24 Engine Swap Parts List for the Honda Civic (EG/EK) and Integra DC2
The K-series swap drops a modern K20 or K24 four-cylinder into an older chassis that never shipped with one, and the single biggest source of failed or stalled builds is showing up short a bracket, a sensor connector, or the right axle. This guide gathers every component a budget-minded K20/K24 swap needs into a logical shopping and planning order. It is built around a Civic EG but carries over almost completely to the EK Civic and the Integra DC2; expect only minor per-chassis variation in axles, belt length, and harness routing. Donor parts are drawn mainly from the Acura RSX Type-S, with the CR-V, TSX, Accord, and EP3 Civic Type R filling specific roles. Work through it as a checklist before ordering anything so the engine and transmission, wiring, drivetrain, cooling, fuel, and steering are all accounted for in one pass rather than in a string of overnight parts runs. Plan a realistic budget of roughly $8,000-$10,000 for a complete swap; the low-$6,000 builds people cite depend on unusually good used deals. Adapted from a community writeup by Froth on K20A.org (https://www.k20a.org/threads/swap-parts-list-the-thread-to-end-all-the-questions.20860/), including corrections from the follow-up discussion.
J32A3 V6 Swap with Plug-and-Play Harness: Retaining Drive-by-Wire Throttle
This guide covers transplanting the J32A3, the 3.2L V6 from the 2006-2008 Acura TL Type-S, into a compact cable-throttle Honda or Acura chassis while keeping the engine's factory drive-by-wire (DBW) electronic throttle rather than converting to a cable throttle body. Most J-series swap writeups treat the electronic throttle as a roadblock and discard it; the approach here keeps the DBW system intact by moving the accelerator pedal position sensor out of the pedal box and onto a firewall-mounted module, which lets the recipient car retain its original cable pedal assembly. The build also addresses the practical fitment problems that come with this engine: a transmission-side accessory belt bracket, a driver-side axle fabricated from three donor shafts, a low wire-count plug-and-play harness, immobilizer defeat, and in-car ECU reflashing through the diagnostic port. As reported, the finished car made 278 lb-ft of torque and 271 hp on the otherwise stock engine and was driven roughly 125 miles each way to an event. This is an advanced, largely experimental build best suited to fabricators comfortable with engine management and custom wiring. Adapted from a community writeup by RPM Systems on K20A.org (https://www.k20a.org/threads/j32a3-swap-w-p-p-harness.87870/), including corrections from the follow-up discussion.
HID Projector Retrofit for the 7th-Gen Honda Accord Headlight
This guide walks through converting the sealed halogen reflector headlights of a 7th-generation Honda Accord (2003-2007) into a custom HID projector setup. A projector uses a lens to concentrate light into a controlled beam with a defined cut-off, rather than scattering it off a reflector bowl, so the goal of the retrofit is a brighter, cleaner, better-defined light pattern. The build combines harvested Acura TSX projector optics, an HID ballast and ignitor set, and a relay harness, then mounts everything inside a re-opened headlight housing using fabricated brackets and shrouds. It is an ambitious weekend fabrication project rather than a bolt-on part: expect to open sealed housings with heat, cut and epoxy internal parts, and fine-tune aim. Treat it as expert-level work, and be aware that even the original builder stalled the project when a spare housing cracked, which is why a dedicated spare set of headlights is strongly recommended. Adapted from a community writeup by blueasianmonkey on DriveAccord (https://www.driveaccord.net/threads/diy-7th-gen-hid-retro-in-progress.12671/), including corrections from the follow-up discussion.
Repainting 7th-Gen Accord OEM Alloy Wheels with Aerosol Wheel Paint
This guide covers refinishing the factory alloy wheels on a 2003 Accord (7th generation) using inexpensive aerosol wheel paint, a project that transforms the stock silver finish into a custom color such as gunmetal for roughly twenty dollars in materials. The same approach applies to most factory alloy wheels and can be done in a home garage with basic supplies. It is a cosmetic upgrade for owners who want a different look without buying aftermarket wheels, and the finish can be surprisingly durable when the surface is prepared properly. The procedure below combines the original method with prep and finishing refinements raised by other members, including surface preparation for adhesion, wet-sanding between coats for a stronger metallic sheen, and a caution about reusing tuner lug nuts on factory wheels. Adapted from a community writeup by YohL on DriveAccord (https://www.driveaccord.net/threads/diy-painting-7-star-oem-wheels.24621/), including corrections from the follow-up discussion.
Honda CR-Z JDM Door Visor (Window Deflector) Installation
This guide covers fitting a clip-and-tape style JDM Honda Access door visor set to a Honda CR-Z. These deflectors mount along the top edge of each door frame and let you leave a window cracked in the rain without water running into the cabin or onto the window switches. The kit relies on a combination of factory-applied double-sided tape and small plastic clips that tuck under the weather strip, so no drilling is required and the install is reversible. The key to a clean result is peeling the tape backing in stages so you can keep adjusting alignment until the visor sits parallel to the door frame. This walkthrough combines the original procedure with the follow-up notes that correct how far to disturb the weather strip and how the front clips near the mirror should be oriented. Adapted from a community writeup by AJ PwR on CRZ Forum (https://www.crzforum.com/threads/diy-jdm-door-visors-installed.3062/), including corrections from the follow-up discussion.
Honda CR-Z Rear Backup Camera Install to the Factory Navigation Screen
This guide covers adding a rear-facing backup camera to a US-spec Honda CR-Z so that the live rear view appears on the factory navigation screen the instant the shifter is moved into Reverse. It relies on a prerequisite modification: the factory nav head must already be fitted with a NavTool interface that accepts an external RCA composite video source, because the stock screen has no native camera input. The install feeds one of the NavTool's auxiliary video inputs from an inexpensive license-plate camera mounted at the rear, and powers that camera from the reverse-light circuit so it only runs while backing up. The same wiring logic can drive any display that accepts an RCA composite signal, including an aftermarket mirror monitor rather than the NavTool, which is the route some builders take. Treat the camera as a parking aid only and always check your surroundings directly before reversing. Difficulty comes from the fiddly rear-panel disassembly, fishing the video cable the length of the car, and tapping the correct reverse-light wire rather than from any single hard step. Adapted from a community writeup by holeydonut on CRZ Forum (https://www.crzforum.com/threads/diy-add-backup-camera-for-reverse-camera-display-on-factory-nav-screen.6509/), including corrections from the follow-up discussion.
Honda CR-Z Inflatable Lumbar Support Bladder Installation
The factory CR-Z seats are widely criticised for offering almost no lower-back support, leaving the seatback flat and unsupportive on longer drives. This guide shows how to add an inexpensive, manually inflated lumbar air bladder to the driver's (or passenger's) seat by tucking it between the seat foam and the upholstery, with no seat disassembly, no hog rings, and no upholstery-shop labour charge. The bladder is squeezed up with a small hand pump so you can dial in exactly how much lower-back bulge you want, and it can be deflated again at any time. The same method works on cloth, leather, heated, and seat-cover-equipped seats, and applies to any CR-Z (ZF1/ZF2) generation. Expect a noticeable improvement in seating comfort and something firm to brace against when working the clutch. Adapted from a community writeup by SS2CRZ on CRZ Forum (https://www.crzforum.com/threads/diy-drivers-seat-lumbar-support-bladder-installation.10550/), including corrections from the follow-up discussion.
Stiffening Honda D-Series Engine Mounts With Poured Polyurethane
This guide covers reinforcing the factory rubber engine mounts on Honda D-series cars by pouring a measured-hardness polyurethane casting compound into the mount cavities. The goal is to cut down engine movement and the slop, thunk, and sloppy handling that come from tired mounts, without paying for full aftermarket poly or solid mounts and without the harsh vibration that very hard fillers like 3M Window Weld produce. The key decision is durometer: Energy Suspension's inserts were later measured at about Shore 72A, and a bowling ball sits near 100A, so a Shore 60A compound was chosen as a firmer-but-livable middle ground that stays reasonable for daily driving. Poured filler bonds to the existing rubber and stiffens it in place, so the mount still looks stock and can be run on the street. It applies to the two side mounts on D-series-powered Civics and CRXs; the rear and upper mounts are typically left alone or filled with a much softer grade. Adapted from a community writeup by kommon_sense on D-Series.org (https://www.d-series.org/threads/diy-homemade-polyurethane-engine-mounts.15434/), including corrections from the follow-up discussion.
Honda Prelude (5th Gen) Blinking Side Marker Wiring
On the fifth-generation Honda Prelude (BB6), the fender side marker lights are not wired to switch with the factory lighting the way earlier generations are, so a small wiring circuit is needed to make them behave like proper markers. This guide wires each side marker so it glows steadily with the parking (running) lights and flashes in time with the turn signal on the same side. The trick is a single SPDT relay per side that normally passes running-light power through to the marker bulb and momentarily interrupts that feed every time the turn signal pulses. The work involves splicing into the existing bumper marker and turn-signal circuits, so it suits anyone comfortable with basic 12V wiring and quick-splice connectors. It applies to the 1997-2001 Prelude and works whether your fender markers were factory-cut or added as a custom installation. Adapted from a community writeup by 98BB6SH on PreludePower (https://www.preludepower.com/threads/diy-5th-gen-side-markers-that-blink-fender-lights.304972/), including corrections from the follow-up discussion.
Honda Prelude H22 Jackson Racing Supercharger (JRSC): Preparation and Installation
This guide covers preparing a Honda Prelude's H22 engine for a Jackson Racing supercharger (JRSC) and installing it alongside the supporting modifications the setup demands. It applies to 4th- and 5th-generation Preludes running the H22, and to anyone reviving one of these increasingly rare M62-based kits. Because the kit's own paperwork covers only the basic bolt-up, this guide focuses on the parts you must have, the pre-install health checks that protect your investment, the gasket fabrication and gasket-removal work the job requires, boost selection through pulley sizing, and the fuel, engine-management, and charge-cooling upgrades needed to run boost safely. Forced induction punishes a tired engine, so the emphasis throughout is on confirming the shortblock, valvetrain, clutch, and gearbox are sound before adding power. Adapted from a community writeup by playludesc on PreludePower (https://www.preludepower.com/threads/the-ultimate-jrsc-installation-guide.358568/), including corrections from the follow-up discussion.
Honda Civic (8th Gen, R18) Engine Bay Wire Tuck
A wire tuck relocates the visible engine-bay wiring of an eighth-generation Honda Civic (R18 engine) into hidden cabin and underbody routing, leaving a clean, stripped-down engine bay for show purposes. The job pulls the main harness out intact, reroutes it through new pass-throughs, extends it by several feet on each side, and relocates the battery to the trunk. It is a demanding cosmetic build that permanently alters the factory harness, so weigh it against resale value and reliability before committing — several members in the follow-up discussion openly questioned whether the visual payoff justifies the work. Budget roughly a full week and expect a great deal of one-wire-at-a-time soldering. Adapted from a community writeup by urbannator on 8th Civic (https://www.8thcivic.com/threads/diy-r18-engine-wire-tuck.541018/).
TSX Front Brake Upgrade for the 8th-Generation Honda Civic (LX/EX)
The base and mid-trim 8th-generation Civic ships with small front rotors that are easily overwhelmed and prone to warping under repeated heavy use. Rather than paying for a full aftermarket big-brake kit, you can fit the larger front calipers, brackets and rotors from a 2006 Acura TSX, which share the Civic's mounting geometry and bolt onto the factory knuckle. This guide covers the complete swap: pulling the stock front hardware, clearancing the dust shield for the larger rotor, mounting the TSX caliper and bracket, plumbing braided front lines, swapping the rear brake lines, and bleeding the system. It applies to the 2006-2011 Civic (LX and EX, front-drum and rear-drum cars included) and delivers noticeably stronger, more fade-resistant braking for a modest parts cost. Adapted from a community writeup by MyLittleR18 on 8th Civic (https://www.8thcivic.com/threads/diy-06-tsx-brakes-on-07-lx.592001/), including corrections from the follow-up discussion.
Acura RSX (DC5) Side Skirt Painting: Matching Black Plastic Skirts to Body Color
Base-model Acura RSX (DC5) coupes left the factory with unpainted black plastic side skirts along the rockers, a look many owners prefer to match to their car's body color. This guide covers painting those textured skirts at home with rattle cans: removing them, cleaning, priming, applying color, clear-coating, and refitting for a finish that reads close to stock at a fraction of body-shop cost (the original project came in under roughly 60 CDN). The technique suits small trim pieces such as skirts, lips, and wings, but not full bumpers or large panels, where the slight color mismatch and the lower durability of aerosol paint show more. Expect a very minor shade difference from the factory finish and some vulnerability to rock chips; by most accounts both are manageable and hard to notice. Adapted from a community writeup by jhova4hustla on Club RSX (https://www.clubrsx.com/threads/diy-guide-to-side-skirt-painting.358445/), including corrections from the follow-up discussion.
Painting Recessed Shift Knob Numbers Red (Acura RSX and Similar OEM Knobs)
This guide fills the factory-recessed digits on an OEM manual shift knob with red, mimicking the look of the sought-after Type R knob for a few dollars instead of buying a replacement. It suits knobs whose numbers are stamped as recessed grooves and whose surface is bare painted plastic or aluminum, such as the Acura RSX (DC5) and related Honda and Acura knobs found on the Integra, Prelude, and similar shifters. Because the digits are sunken below the surface, paint that settles into them stays put while the excess wipes off the surrounding metal, so the job is forgiving and quick. The same method works with other colors to match interior accents. Adapted from a community writeup by Stitch on Club RSX (https://www.clubrsx.com/threads/diy-painted-shift-knob-numbers.365931/), including corrections from the follow-up discussion.
Acura RDX Console Compartment Light: Bulb Replacement and Wire Slack Fix
On the first-generation Acura RDX, the small courtesy lamp inside the center console storage compartment eventually burns out. Owners who try to change it often discover the factory wiring pigtail feeding the socket is too short to pull the lamp clear of the opening, which makes the swap far more awkward than it should be. The service manual actually calls for roughly 7 cm of free pigtail, and that slack is present in the harness but hidden: at the factory the wire's retention clip was taped much too far down the lead. This guide covers both the bulb change itself and the one-time repositioning of that clip so all future bulb changes can be done comfortably from inside the compartment. The correct lamp is a 14 V, 1.4 W bulb, sold as a Sylvania 74 at most auto parts stores. Adapted from a community writeup by 737 Jock on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/diy-replace-console-light-fix-short-console-light-wire-803118/), including corrections from the follow-up discussion.
Acura RDX Rear Door Coaxial Speaker Replacement
This guide covers swapping the factory rear-door coaxial speakers in a first-generation Acura RDX for aftermarket 6.5 in. coaxials. It is a common early step for owners upgrading the stock audio system, and the same procedure applies to either rear door. Because the RDX door opening is not a bolt-in aftermarket fit, the job involves cutting off the factory connector, extending the short door leads, and drilling new mounting holes, so plan on light wiring and drilling work rather than a pure plug-and-play swap. Choose replacements rated at 2 ohms so they present the same load the factory head unit and amplifier expect. If you later add aftermarket amplifiers, read the tips below first: the RDX carries a data link between the head unit and the factory sub amplifier that should be preserved. Adapted from a community writeup by droebuck on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/rdx-non-tech-08-stock-speaker-replacement-adding-amos-806044/), including corrections from the follow-up discussion.
Acura 1G TL Fog Light Conversion: H3C to H3 Bulbs
The first-generation Acura TL fog light housing is factory-wired for H3C bulbs, a variant whose ground path is built into the bulb itself. Genuine H3C bulbs are expensive and awkward to source, while the plain H3 bulb is stocked almost everywhere and sold in many colour and output options. Because a standard H3 provides only a single live lead and no integrated ground, it will not simply drop into an H3C socket; the missing ground must be supplied externally. This guide covers adding that ground so common H3 bulbs work in the stock housing: you fabricate a short jumper lead, bond one end to the metal retaining ring under a housing screw (which grounds to the chassis), and plug the other end into the vacant side of the fog light connector. It applies to the 1G Acura TL, including the 3.2TL. The reward is cheap, easy-to-replace bulbs and the freedom to choose beam colour. Adapted from a community writeup by KADAW on AcuraZine (https://acurazine.com/forums/1g-tl-problems-fixes-118/h3c-foglight-conversion-diy-585072/), including corrections from the follow-up discussion.
Acura RDX SH-AWD Rear Differential Fluid Change
This guide covers replacing the rear differential fluid on the Acura RDX and other Honda and Acura models fitted with the SH-AWD system. On all-wheel-drive cars the maintenance minder flags this job with a service code ending in 6 (for example A16, B16, or A6); Acura calls for the first change near 15,000 miles and roughly every 30,000 miles after that. The rear differential depends on friction modifiers in its fluid to protect the constantly slipping clutch packs, and those additives wear out invisibly well before the fluid looks dirty, so the interval is worth keeping even when the drained oil still appears clean. The work is straightforward: most owners find it no harder than an engine oil change, and it replaces a $120 to $130 dealer service with about $25 to $30 in parts. The one real trick is that the fluid must be pumped into a side fill hole rather than poured, and you must confirm the fill plug will open before you drain anything out. Adapted from a community writeup by Cusewordsmith on AcuraZine (https://acurazine.com/forums/2g-rdx-diy-faq-406/rear-differential-fluid-replacement-899684/), including corrections from the follow-up discussion.
Acura RDX (2G) Engine Block Heater Installation
A screw-in engine block heater warms the coolant before startup, reducing cold-start wear and delivering cabin heat sooner in freezing climates. This guide covers fitting the factory screw-in heater element into the second-generation Acura RDX, where the plug threads into the block casting stamped with the engine serial number, tucked between the radiator and the valve cover. The job is mostly about gaining access and managing coolant: the heater bore sits in a cramped part of the bay, and even after the radiator and block are drained a further amount of coolant escapes when the plug comes out. The same screw-in element and method also apply to related Honda/Acura engines that use the equivalent factory kit. Confirm you can physically reach the plug with your tools before draining anything. Adapted from a community writeup by Tech on AcuraZine (https://acurazine.com/forums/2g-rdx-diy-faq-406/block-heater-install-963481/), including corrections from the follow-up discussion.
Installing a Shift Light in a Honda/Acura
A shift light watches engine RPM and illuminates at a preset threshold, letting you shift by a clear visual cue instead of glancing at the tachometer. That is useful whether you are chasing consistent upshifts through a corner during autocross or simply reminding yourself to short-shift for economy, and it removes the guesswork of trying to hear the difference between, say, 6,800 and 7,000 RPM by ear. Most units are generic and will work with almost any engine, so selection comes down to size, shape, and where you plan to mount it. This guide covers a full install: choosing a mounting spot, wiring switched power and ground, and picking up the tachometer signal either behind the gauge cluster or out in the engine bay. It applies broadly to Honda and Acura models such as the Integra, where an unused accessory position in the interior fuse box makes a convenient switched power source. Adapted from a community writeup by StyleTEG on Team Integra (https://www.team-integra.net/threads/how-to-install-a-shift-light.342542/).
High-Flow Fuel Pump Upgrade Using the Factory Honda/Acura In-Tank Hanger
Turbocharged Honda and Acura builds quickly outrun the factory fuel pump and its thin factory wiring, but you do not have to buy a complete aftermarket hanger to feed a bigger pump. This guide covers converting a stock in-tank fuel pump hanger to carry a high-flow pump, heavy-gauge power and ground wiring, and larger AN feed and return plumbing. It applies to the DA/DC Integra and EG/EK-era Civic and CRX platforms that share this style of top-hat hanger, and it is aimed at boosted setups making roughly 500 wheel horsepower and up. The reward is a clean, leak-resistant fuel supply that keeps the original sealing geometry instead of relying on aftermarket pass-through fittings. Several routes are shown, from the simplest OEM-style approach to fully re-plumbed hangers, so you can match the effort to your power target and fuel. Adapted from a community writeup by ESP.net on Honda-Tech (https://honda-tech.com/forums/forced-induction-16/how-one-way-using-oem-fuel-pump-hanger-upgraded-pump-10-gauge-wire-relay-3321155/), including corrections from the follow-up discussion.
Acura 3.0 CL / TL Automatic Transmission Fluid Cooler Install
An automatic transmission runs cooler and tends to last longer when its fluid is given extra opportunity to shed heat before it circulates back into the gearbox. This guide covers adding an inexpensive aftermarket transmission fluid cooler, such as a Hayden OC-1677, to the first-generation Acura 3.0 CL and the closely related second-generation TL, both of which are known for heat-stressed automatics. The cooler is spliced into the transmission's return line and mounted in the airflow ahead of the radiator, so fluid heading back to the transmission is chilled first. The job is a bolt-on with no radiator coolant connections involved: you clear the battery and its trays for access, tap into the correct cooler line, plumb the new cooler in, reposition the horn out of the way, and top off the fluid. The original write-up and photographs were credited to forum member Dustbuster4. Adapted from a community writeup by klepto on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/tranny-cooler-install-470677/), including corrections from the follow-up discussion.
Honda Fit (GE8) Stock Airbox Intake Restriction Mod
The second-generation Honda Fit (GE8) draws intake air through a factory airbox whose inlet necks down to a square throat just under two inches on each side, tucked beneath the resonator chamber. That restriction trims the top of the flow curve while the resonator muffles induction sound. This guide covers reworking the stock box to breathe more freely without buying an aftermarket intake: enlarging the inlet, clearing an internal divider, and sealing the plastic against underhood heat. Owners report a modest bump in the midrange around 3,000-4,000 rpm and a noticeably stronger induction note, all while retaining the factory mounting points and the option to reinstall the resonator lid so the change stays invisible to a dealer. A popular variant skips the box surgery and instead couples the factory MAF/MAP tube straight to the throttle body; it is covered here as an alternate path. This applies to the GE-chassis Fit; the earlier GD3 airbox is shaped differently and does not translate directly. Adapted from a community writeup by FITProject on FitFreak (https://www.fitfreak.net/forums/2nd-gen-ge8-specific-fit-engine-modifications-motor-swaps-ecu-tuning-sub-forum/56264-not-so-pointless-airbox-mod-diy.html), including corrections from the follow-up discussion.
Fitting Honda Accord Oval Exhaust Tips to a Fit Sport (GE8)
This guide covers bolting a set of chrome oval Honda Accord exhaust tips (Part# 18310-TA1-315) onto a 2013 Honda Fit Sport (GE8). The Accord tip's oval profile lines up neatly with the oval cutout in the Fit Sport rear bumper, giving a wider, more finished appearance without cutting any bodywork. The challenge is purely mechanical: the Accord's exhaust pipe is fatter than the Fit's, and the Accord tips are shorter than the factory Fit tips, so a pair of spacer brackets and a retaining strap are fabricated to bridge the size difference and hold everything firmly. A couple of cosmetic tricks hide the smaller Fit pipe visible inside the larger tip opening. This is a bolt-on appearance modification with no exhaust cutting or welding required on a stock bumper. Adapted from a community writeup by BMW ALPINA on FitFreak (https://www.fitfreak.net/forums/2nd-gen-ge8-specific-fit-engine-modifications-motor-swaps-ecu-tuning-sub-forum/76530-diy-accord-exhaust-tips.html), including corrections from the follow-up discussion.
Front Adjustable Camber Kit Installation (1G Acura CL / 94-97 Honda Accord)
Lowering a 1G Acura CL or a 1994-1997 Honda Accord throws the front wheels into excessive negative camber, which wears the inside edges of the tires and can hurt handling. A bolt-on front camber kit replaces the fixed factory adjuster at the lower control arm with an adjustable one, letting an alignment shop dial the top of the wheel back toward vertical. This guide covers the common bolt-in adjuster styles: the Ingalls slotted-shaft type, whose slide is repositioned during alignment, and the cheaper fixed two-hole type. Plan on doing one side at a time and booking an alignment as soon as both sides are finished, since the kit only makes adjustment possible, it does not set the final angle. Note that ball-joint-style kits (such as Eibach) are a different, more involved job and are best left to a shop. Adapted from a community writeup by chuckz on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/front-camber-kit-install-471801/), including corrections from the follow-up discussion.
Honda Fit (GE8) Protective Mesh Grille Install
A screen mounted behind the front grille opening of the second-generation Honda Fit (GE8, roughly 2009 onward) shields the radiator, air-conditioning condenser and other exposed components from stones, road debris and bugs that warranty coverage will not repair. The job uses inexpensive mesh cut to fit the opening and secured with cable ties, so it costs only a few dollars and leaves the factory parts unmodified when done with adhesive anchors. It applies to both base and Sport GE8 cars, though the Sport bumper's opening is tapered rather than a clean rectangle and needs more careful measuring. The write-up below combines the base-model method with fixes and material choices offered by owners who repeated it, including durable metal alternatives and better ways to keep the anchors from letting go. This modification is optional and cosmetic-plus-protective; take your time, because the mesh edges are sharp and the fasteners are fragile. Adapted from a community writeup by Retrofit09 on FitFreak (https://www.fitfreak.net/forums/2nd-gen-ge8-specific-fit-exterior-modifications-jdm-styling-sub-forum/46911-diy-ge8-mesh-grille.html), including corrections from the follow-up discussion.
Honda Fit Billet Grille Overlay Installation with Zip Ties (A/C Condenser Rock Protection)
A mesh or bar-style grille overlay mounted over the factory front grille shields the A/C condenser and radiator from stones and road debris, a common failure point that is expensive to repair once the condenser is punctured. This method fastens a one-piece billet overlay to the existing plastic grille using hidden zip ties, so no cutting, drilling, or permanent modification of the car is needed, and the overlay can be removed later if desired. It was worked out on a second-generation Honda Fit (GE8) but transfers to the first-generation GD Fit and to most bar-type overlays, whether polished aluminum, stainless steel, or a black-anodized or Plasti-Dipped finish. Adapted from a community writeup by Triskelion on FitFreak (https://www.fitfreak.net/forums/2nd-gen-ge8-specific-fit-exterior-modifications-jdm-styling-sub-forum/72906-diy-grille-overlays-protect-c-condenser.html).
Acura CL (1G) Factory Stereo iPod Integration Adapter Install
This guide covers wiring an iPod2Car (PAC PXDP) integration adapter into the factory head unit of a first-generation Acura CL so the iPod plays through the OEM stereo. Unlike an FM transmitter, this hardwired adapter delivers full-fidelity audio, charges the iPod, and lets you select and scroll tracks with the dashboard and steering-wheel controls while keeping the stock stereo in place. It suits owners who want clean integration without swapping in an aftermarket head unit. According to the follow-up discussion, the same adapter that is listed for the 1994-1997 Accord (and 1993 SE) also fits the CL, with or without the BOSE system, and it is intended for the factory radio only. The main trade-off is a notch cut into the console CD holder to route the dock cable; an alternate route is noted in the tips. Adapted from a community writeup by Jaysfan5432 on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/diy-ipod-adapter-stock-stereo-485933/), including corrections from the follow-up discussion.
Honda Fit (GE8) Focal 165V1 Component Speaker Install Using Factory Door Mounts
This guide covers fitting a Focal 165V1 component set into the front doors of a second-generation Honda Fit (GE8, including the 2009 base model) while reusing the factory speaker location. The stock mount is not deep enough for the aftermarket woofer as-is, so part of the plastic mounting ring is trimmed away to let the new driver seat flat. The tweeter is set into the door card at the pre-marked factory position, and the crossovers are tucked inside the door. Expect a clear step up in clarity and mid-bass over the OEM speakers, particularly when paired with an upgraded head unit. This is an involved but achievable job that mostly requires patience and care when cutting the factory plastic. Adapted from a community writeup by NipponFit on FitFreak (https://www.fitfreak.net/forums/2nd-gen-ge8-specific-fit-interior-modifications-sub-forum/55955-diy-focal-165v1-installed-using-factory-mounts.html), including corrections from the follow-up discussion.
Acura RDX (First Generation) Transfer Case Fluid Change
The first-generation Acura RDX uses a transfer unit on its all-wheel-drive system that holds its own small charge of gear oil, separate from the transmission and the rear differential. This guide covers draining and refilling that transfer case, a quick service that most owners fold into their regular fluid changes. The unit takes only 430 ml (0.45 qt), and both service plugs are turned with a bare 3/8-inch drive, so the job is well within reach of a beginner and can even be done without lifting the vehicle if you can reach the plugs. Honda specifies a hypoid gear oil meeting API GL-4 or GL-5; because no dedicated genuine fluid is cataloged for this application, a quality synthetic 75W-90 is the popular choice. The same fluid specification is shared across several Honda and Acura all-wheel-drive models of the era, though the plug locations described here are specific to the RDX. Fresh fluid keeps the transfer gears protected and gives you a chance to confirm the housing is dry. Adapted from a community writeup by 737 Jock on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/diy-transfer-fluid-change-794283/), including corrections from the follow-up discussion.
Acura RDX (Gen1 Tech/Navi): USA Spec ACUxl iPod/iPhone Interface Install
This guide covers installing a USA Spec PA15-ACUxl interface into a first-generation Acura RDX equipped with the Technology (navigation) package, giving you a factory-integrated iPod/iPhone connection through the existing audio system. The adapter wires inline at the satellite radio module behind the glove box, so no head unit removal is required and factory satellite radio stays functional. Because it is a plug-in interface with a supplied harness, the job is quick and beginner-friendly. Note that a non-navigation RDX uses a different module (PA15-HON3) and a similar but not identical routine. If you are not confident working inside the dashboard, have the unit installed professionally. Adapted from a community writeup by H22A_CD5 on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/diy-installing-usa-spec-acuxl-07-rdx-tech-834830/), including corrections from the follow-up discussion.
Programming Acura HomeLink to a Garage Door Opener
This guide explains how to teach the built-in HomeLink transceiver in an Acura to operate a residential garage door opener, turning the car itself into the remote. It applies to HomeLink-equipped Acura models such as the second-generation RDX, where three programmable buttons are built into the overhead console or headliner. The factory owner manual covers only the basics and omits several practical details, especially for openers that use a rolling security code, which is the case that trips up most people. Working through the complete sequence, including the rolling-code synchronization performed at the opener motor unit, is what separates a button that does nothing from one that reliably lifts the door. Adapted from a community writeup by AndyI on AcuraZine (https://acurazine.com/forums/2g-rdx-audio-bluetooth-electronics-navigation-405/detailed-guide-linking-your-acuras-homelink-your-garage-opener-884170/), including corrections from the follow-up discussion.
Acura RDX Painted Grille Molding Replacement (Without Bumper Removal)
This guide covers swapping the factory center grille molding on the second-generation Acura RDX for a body-color painted version, giving the front end a cleaner, monochromatic look while leaving the chrome surround and emblem to stand out. Although the factory service procedure calls for removing the front bumper cover to reach the grille, the job can be done from the front of the car in about an hour without pulling the bumper. Note that the molding carries a metallic plating that a painter must etch before primer and color will adhere, so budget for that extra prep when having the part sprayed. Adapted from a community writeup by dlee337 on AcuraZine (https://acurazine.com/forums/2g-rdx-diy-faq-406/how-painted-grille-molding-swap-892631/), including corrections from the follow-up discussion.
Acura RDX Advance Running Board Installation (2013-2016)
The factory Advance running boards for the second-generation Acura RDX span the full length of each rocker and give easier access to the cabin and roof, but the accessory kit ships without instructions and the job is far from bolt-on. Both plastic underbody covers must be marked, drilled, opened with a hole saw and trimmed before the mounting brackets and boards can go on, which is why some owners have paid roughly $300 to have a shop do it. This guide walks through the complete install for a 2013-2016 RDX, from lifting the vehicle to final torque, and folds in the follow-up notes about mud-guard clearance and pre-threading the bracket holes. Work over a clean floor, protect your eyes while drilling, and support the vehicle on stands the whole time. Adapted from a community writeup by carbonTSEX on AcuraZine (https://acurazine.com/forums/2g-rdx-diy-faq-406/diy-advance-running-boards-install-942146/), including corrections from the follow-up discussion.
Acura RDX (2G): Hidden USB Phone Charger and Mount Install via Radio Trim Removal
This guide covers a clean, mostly reversible way to add a fast USB phone charger and a subtle phone mount to the second-generation Acura RDX, which lacks factory Android Auto. Rather than leaving a cable and adapter hanging from the 12V socket in the storage pocket, the charging cable is routed up through a dashboard vent to a magnetic mount, while the charger and its power feed are hidden inside the radio console and wired directly to the fuse panel. The work involves removing the lower storage trim and the radio bezel, then making a switched or fused 12V connection, so basic trim-removal and wire-crimping skills are needed. It applies to the 2013-2018 RDX and to owners who want a tidy phone-charging setup without permanent dashboard damage. Adapted from a community writeup by rubinox on AcuraZine (https://acurazine.com/forums/2g-rdx-diy-faq-406/radio-trim-removal-cell-mount-charger-installation-989903/), including corrections from the follow-up discussion.
Sanding an Oversized Transmission Shim Down to a Custom Thickness
When a transmission build calls for a shim of a specific thickness that is not stocked or does not exist as an off-the-shelf part, you can start from a slightly oversized shim and remove material by hand until it reaches the dimension you need. This technique was used to adapt a fifth gear for service as a sixth gear, where no standard shim matched the required stack height. The approach is general: order a DIN 988 shim that already has the correct inner diameter and outer diameter but is a little too thick, then sand it down evenly on a flat surface while checking the thickness with a micrometer. It calls for basic shop equipment rather than a machine shop, and works for any Honda manual gearbox where you need to fine-tune gear or bearing endplay with a shim you cannot buy. Adapted from a community writeup by Bense on Honda-Tech (https://honda-tech.com/forums/transmission-drivetrain-127/diy-make-your-thick-shims-thinner-3348005/), including corrections from the follow-up discussion.
Honda Fit (GE8) Ground Wire Upgrade
Adding supplemental ground straps to a second-generation Honda Fit (GE8) gives the charging system lower-resistance return paths between the battery, engine block, transmission, and chassis. The goal is to reduce voltage sag under load: the owner in this thread was bothered by headlights dimming and idle climbing toward 1000 RPM whenever the air conditioning or radiator fans engaged, and reported that the extra grounds noticeably calmed both. The whole job uses about ten dollars of wire and terminals and requires no cutting of factory harnesses. It applies to the GE8 Fit but the same approach transfers to most Honda four-cylinders. Adapted from a community writeup by kurisux92 on FitFreak (https://www.fitfreak.net/forums/2nd-gen-ge8-specific-fit-engine-modifications-motor-swaps-ecu-tuning-sub-forum/73026-diy-grounds.html), including corrections from the follow-up discussion.
Socketing and Chipping an OBD0/OBD1 Honda ECU
Chipping (socketing) a Honda or Acura/Integra engine computer replaces the factory-soldered program chip with a removable, reflashable EEPROM so you can load and tune your own base maps with software such as eCtune, Crome, or Neptune. Only OBD0 (88-91) and OBD1 (92-95) Civic, CRX, Integra, and Prelude ECUs can be converted this way; OBD2 (96-00) units, including the stock computer in an OBD2 Accord, cannot. The job is careful electronics rework rather than mechanical work: you desolder several factory parts, install a socket and a latch IC, add a jumper, and refresh an aging capacitor, all without overheating the board. Common chippable part numbers include P06, P28, and P72; a VTEC ECU can be run on a non-VTEC engine by disabling VTEC in software, leaving headroom for a later head or motor swap. Adapted from a community writeup by DIYMIKE on Honda-Tech (https://honda-tech.com/forums/engine-management-tuning-124/diymike-how-chip-your-own-ecu-2391816/), including corrections from the follow-up discussion.
Honda Civic (8th Gen) Hands-Free Microphone Repositioning for Clearer Calls
The hands-free telephone (HFT) and voice-control microphone on the 8th-generation Honda Civic sits recessed in the overhead lighting console toward the passenger side. Many owners found that callers reported muffled, distant-sounding speech, particularly at motorway speeds, and that the voice-recognition system struggled with the same setup. This guide covers the community-developed fixes for that problem, ranging from a simple, fully reversible foam pack to a full relocation of the microphone toward the driver. The key insight from the discussion is that the microphone is directional and sits too deep inside a small acoustic cavity, so it reflects roof and passenger noise back into the element; bringing it up to the perforated cover and orienting it toward the driver is what actually improves pickup. It applies to right-hand-drive 8th-generation Civics fitted with the factory HFT and voice control, and it cannot be performed on cars with the panoramic glass roof. Adapted from a community writeup by Pottsy on Civinfo (https://www.civinfo.com/threads/how-to-swap-the-microphone-from-left-to-right.53/), including corrections from the follow-up discussion.
Honda Fit (GE8) Cup Holder LED Accent Lighting Install
This guide covers adding LED accent lighting to the panel above the center-console cup holders on the second-generation Honda Fit (GE8, roughly 2009-2013), an area Honda left unlit from the factory. The finished mod softly illuminates the console and cup-holder area at night so you are no longer feeling around in the dark, and it switches on with the parking and headlights. Two approaches are described: a low-cost do-it-yourself version using a pair of small LEDs mounted in the existing panel, and an OEM-style retrofit that installs the later 2012 center cover already tooled for a factory bulb holder. Both draw power from the same switched lighting circuit, and the wiring can be arranged either to stay at full brightness with the lights on or to dim together with the dash illumination. The job suits a beginner comfortable with basic soldering and wire-tapping. Adapted from a community writeup by chubbykai on FitFreak (https://www.fitfreak.net/forums/2nd-generation-ge8-specific-diy-repair-maintenance-sub-forum/47740-diy-install-cup-holder-led-s-ge8.html), including corrections from the follow-up discussion.
Valentine One (V1) Radar Detector Hardwire Install - Honda Fit (GE8)
The Valentine One (V1) radar detector normally draws power from a 12V accessory socket, but hardwiring it frees that socket, tucks the wiring out of sight, and lets you place the concealed display wherever it is most useful. This guide covers a fully reversible install in the second-generation Honda Fit (GE8) that taps the interior fuse box with an Add-a-Fuse instead of splicing into factory harness wires. Because the tap simply plugs into a fuse slot, the whole setup can be pulled in seconds and never pierces existing wiring. It suits any V1 fitted with the standard RJ11 hardwire kit and adapts to other detectors wired the same way. One point to settle before you shop: the GE8 uses low-profile mini fuses from the factory, but most Add-a-Fuse taps need standard-profile mini fuses because their spade contacts must stay exposed. Adapted from a community writeup by specboy on FitFreak (https://www.fitfreak.net/forums/2nd-generation-ge8-specific-diy-repair-maintenance-sub-forum/58572-valentine-one-v1-hardwire-diy.html), including corrections from the follow-up discussion.
Honda Fit Manual Transmission Fluid Change (GD/GE8)
Fresh manual transmission fluid restores smooth, precise shifting on the Honda Fit, easing the notchy engagement into third gear and the light gearbox whine that many owners notice as the factory fill ages. This procedure covers draining and refilling the manual gearbox on the second-generation Fit (GE8); the same approach applies to the first-generation GD and to later manual cars through roughly the 2013 model year. The work is only slightly more involved than an engine oil change: the gearbox uses a plain drain-and-fill layout with no filter, and the side-mounted fill plug doubles as the level indicator, so the case is simply topped up until fluid weeps from that opening. Plan on servicing the fluid about every 30,000 miles or three years, sooner under sustained mountain or heavy-duty driving, to keep the synchros shifting cleanly. Adapted from a community writeup by z06dustin on FitFreak (https://www.fitfreak.net/forums/2nd-generation-ge8-specific-diy-repair-maintenance-sub-forum/65953-diy-manual-transmission-fluid-change.html), including corrections from the follow-up discussion.
Honda Fit (GE8): Accord Horn Swap and Blackout Mesh Grille Install
This guide covers two popular, low-cost front-end modifications for the second-generation Honda Fit (GE8): replacing the weak factory horn with a Honda Accord horn, and fitting a blackout mesh panel behind the lower grille to block road debris and give the front end a cleaner look. Both jobs share the same access work, removing the engine-bay bulkhead cover and the hood-latch cover, so tackling them together saves effort. The Accord horn reuses the Fit's original mounting bolt and factory connector, while the mesh is trimmed to shape and zip-tied to the existing grille bars. One honest caveat: the Accord horn is a tone change rather than a volume upgrade. Several owners measured it as quieter and lower in pitch than the stock unit, with the decibel rating stamped right on its bracket, so choose it for a deeper sound, not more loudness. Trim requirements can differ slightly between Sport and base models, so always test-fit the mesh against your own grille. Adapted from a community writeup by soxfan0434 on FitFreak (https://www.fitfreak.net/forums/2nd-generation-ge8-specific-diy-repair-maintenance-sub-forum/67536-diy-accord-horn-mesh-grille.html), including corrections from the follow-up discussion.
Honda Fit (2nd Gen) Timing Cam Chain Replacement
This guide covers removing and replacing the timing (cam) chain on the second-generation Honda Fit, along with its tensioner, tensioner slider, and chain guide. The L15A engine in these cars drives its valvetrain with a chain rather than a rubber belt, so the assembly normally lasts the life of the engine and rarely needs routine service. The procedure is still worth understanding for cases of confirmed chain stretch, a failed tensioner, or a cylinder-head rebuild that requires the valvetrain to be re-timed. Because the chain sits behind the accessory drive, the job requires supporting the engine, dropping the side mount, and removing the chain case; there is no shortcut through the wheel well. The work also hinges on precise timing-mark alignment, and this is an interference engine, so an error can bend valves. Adapted from a community writeup by FitCrazy80 on FitFreak (https://www.fitfreak.net/forums/2nd-generation-ge8-specific-diy-repair-maintenance-sub-forum/67934-diy-replacing-cam-chain-09-a.html), including corrections from the follow-up discussion.
Honda Fit (GE8) Spark Plug Access and Replacement
Replacing the spark plugs on the second-generation Honda Fit Sport (GE8, 1.5L L15A) is mechanically simple, but Honda buried the coils and plugs beneath the windshield cowl, so most of the effort goes into gaining access. This guide covers the full teardown needed to reach all four ignition coils: removing the wiper arms, the plastic cowl grille, the wiper harness, and the black metal shelf that sits against the firewall. It also covers correct plug preparation and the reassembly sequence that keeps the cowl seated without gaps. Expect a first-time job to take a couple of hours even though the plug swap itself is quick. Owners across a wide mileage range have reported plugs that backed out or arrived loose from the factory, so this is also a worthwhile inspection. Note that the 1.2L L12B2 engine used in some European Fit/Jazz cars takes a different plug and is not covered by the part numbers here. Adapted from a community writeup by CasualFitOwner on FitFreak (https://www.fitfreak.net/forums/2nd-generation-ge8-specific-diy-repair-maintenance-sub-forum/73214-diy-get-access-spark-plug-2009-sport.html), including corrections from the follow-up discussion.
Parrot CK3100 Hands-Free Kit and Multicomm Steering-Wheel Control Retrofit (Honda Civic Type S / FK)
This guide covers retrofitting a Parrot CK3100 Bluetooth hands-free kit into an 8th-generation Honda Civic Type S (FK), paired with the Parrot Multicomm interface so the factory steering-wheel volume and skip buttons also drive the phone system — answering, rejecting and ending calls, starting voice dialling and adjusting the kit's volume. The audio side plugs in through an Iso2Car ISO adaptor, so no factory wiring is cut for the head-unit connection; the only wire that must be tapped is a single signal line at the steering-column connector for the Multicomm. The result is a tidy, hidden hands-free system with a microphone concealed at the A-pillar and the control electronics tucked behind the gear lever. Plan for the trickiest parts to be routing cable behind the trim and correctly identifying the one steering-wheel wire. Adapted from a community writeup by opjepass on Civinfo (https://www.civinfo.com/threads/how-to-installing-parrot-ck3100-with-multicomm-blue-lights-sound-isolation.7605/), including corrections from the follow-up discussion.
Feeding a Composite Video Source into the Honda Civic Factory Navigation Screen
This guide covers feeding a composite video signal - from a DVD player, portable media device, games console, car PC, or an aftermarket reversing camera - into the factory navigation screen of the eighth-generation Honda Civic (3- and 5-door cars fitted with satellite navigation but without a factory reverse camera). The navigation head unit carries a spare camera input on its rear connector; by presenting a valid NTSC signal there and convincing the unit that a genuine reverse camera is present, the existing dash screen becomes a monitor for any external source. It suits owners who would rather reuse the built-in display than mount a second screen. The wiring here applies to pre-facelift units; the connector layout changed on post-2009 facelift cars and is not fully mapped in this guide. Adapted from a community writeup by Bog on Civinfo (https://www.civinfo.com/threads/how-to-connect-video-source-to-navigation-system.7772/), including corrections from the follow-up discussion.
Honda Civic i-CTDi (FK3) Diesel EGR Valve Cleaning
The i-CTDi is Honda's 2.2-litre N22A turbo-diesel used in the FK-generation Civic. Its exhaust gas recirculation (EGR) valve routes a portion of exhaust back into the intake to lower combustion temperatures, and over tens of thousands of kilometres soot accumulates on the valve, its mounting face, and the mouth of the intake manifold. Cleaning this deposit restores airflow and smoother running without replacing any parts. This procedure covers pulling the valve, cleaning it, and refitting it on the FK3-generation N22A Civic i-CTDi, and it applies equally to other diesel installations of that engine. On a well looked-after engine the build-up is surprisingly light, so this is realistically a service to do roughly every 100,000-150,000 km rather than a frequent chore. No special tools or torque data are published in the source thread, so reassemble the fasteners firmly by feel. Adapted from a community writeup by lucar on Civinfo (https://www.civinfo.com/threads/how-to-clean-the-egr-valve-on-a-civic-i-ctdi-fk3.25696/), including corrections from the follow-up discussion.
Honda Civic Puddle Light (Door Courtesy LED) Installation
This guide covers fitting under-door puddle lights (LED accent strips) to a Honda Civic so they cast light onto the ground beside each door. The work involves removing the door card, running a feed wire through the flexible boot between the door and body, and tapping it into an existing switched lighting circuit so the strips come on and off with the car's courtesy lighting. It applies to Civic models with a door-mounted tweeter and speaker and factory footwell lighting; where footwell lamps are absent, the same wire can be joined to the interior-lamp door trigger instead. It is a rewarding cosmetic upgrade but calls for care during door-panel removal and wire routing, so budget time and work methodically. Adapted from a community writeup by onweed on Civinfo (https://www.civinfo.com/threads/howto-install-puddle-lights.45220/), including corrections from the follow-up discussion.
Installing an LED Daytime Running Light (DRL) Kit and Control Module on a Honda Civic
This guide covers fitting an Atomic LED daytime running light (DRL) kit and its control module to a Honda Civic. The kit mounts a pair of low-draw LED strips to the front grille (or, in the alternate version, into the fog-lamp blanks); they light automatically once the engine is running and switch off when the sidelights come on, keeping the setup road-legal after dark. The control module removes the need to hunt for a switched ignition feed and to run a manual switch back into the cabin: it senses the rise in battery current the moment the engine starts and powers the LEDs from that, then cuts them through a single sidelight tap. Fitment is broadly the same across Civic variants, but battery position differs between petrol and diesel cars and can leave very little working room behind one headlight. Adapted from a community writeup by atomic on Civinfo (https://www.civinfo.com/threads/how-to-fit-atomics-led-drl-kit-control-module.60966/), including corrections from the follow-up discussion.
Retrofitting an Aftermarket Reversing Camera to an Aftermarket Head Unit (Civic Type R FN2)
This guide covers retrofitting an aftermarket reversing camera together with an aftermarket double-DIN head unit to a Honda Civic Type R (FN2), as documented on a 57-plate car running a Pioneer AVIC-F930BT. It walks through adapting the single-DIN dash aperture using a double-DIN conversion kit and 103mm cage, mounting the head unit securely, and then routing the camera's video feed and reverse-trigger wire from behind the head unit all the way back to the reversing light, so the screen automatically switches to the camera view when reverse gear is selected. Electrically the work is simple; the time goes into the long cable run through the cabin and into the boot. Applies to the FN2 Civic Type R and similar three-door Civics using an aftermarket double-DIN conversion. Adapted from a community writeup by smig on Civinfo (https://www.civinfo.com/threads/how-to-fit-an-aftermarked-reversing-camera-to-an-aftermarked-head-unit.65100/), including corrections from the follow-up discussion.
Honda Civic Radiator Removal and Replacement
This guide covers removing and refitting the engine cooling radiator on a Honda Civic, a job you would take on to replace a leaking or corroded radiator, swap failed cooling fans, or renew the expansion bottle. The radiator sits in a tight pocket behind the front bumper, so most of the work is about clearing enough surrounding hardware to lift the core straight up and out without damaging the fins or the fans. The procedure applies to Civic petrol models and, with one extra clearance step, to the 2.2 i-CDTi diesel, which carries an auxiliary intercooler radiator ahead of the main core that steals lift-out space. Read the whole guide before starting, work only on a fully cold engine when handling the cooling system, and allow the best part of a day if this is your first attempt. Adapted from a community writeup by aidu88 on Civinfo (https://www.civinfo.com/threads/how-to-remove-replace-water-radiator.69995/), including corrections from the follow-up discussion.
Honda Fit (GK) Throttle Pedal Spacer Installation
The accelerator assembly in the third-generation (GK) Honda Fit bolts flat against the firewall, which leaves the pedal sitting low relative to the brake — roughly 3.5 cm lower on the installer's car. That height gap makes heel-and-toe downshifting awkward and forces an exaggerated ankle angle. The Acuity Instruments Throttle Pedal Spacer sits between the firewall and the accelerator unit and raises the pedal to one of three selectable positions (A, B, or C), each giving a slightly different feel. With the pedal closer to the brake, heel-toe rev-matching becomes noticeably easier and downshifts smoother. Plan on re-dialing your seat and steering-wheel position afterward, and expect to try each spacer position for a while before settling on one. This is a straightforward bolt-on that reuses the factory mounting hardware and takes under an hour. Adapted from a community writeup by nisco on FitFreak (https://www.fitfreak.net/forums/3rd-gen-gk-specific-fit-interior-modifications-sub-forum/96845-diy-acuity-instruments-throttle-pedal-spacer-installation.html), including corrections from the follow-up discussion.
Honda Civic (8th Gen) Key-In-Ignition Reminder Chime Delete
The 8th-generation Honda Civic (2006-2011 FK hatch and FN2 Type R, plus the related coupe) chimes repeatedly whenever the key is present in the ignition and a door is open - for example while you valet the interior with the stereo playing. Unlike the 9th-generation cars, there is no menu option to switch this reminder off. This guide silences it at the source: a microswitch inside the ignition barrel that reports key presence to the multiplex integrated control unit (MICU). Interrupting that one signal stops the chime while leaving every other reminder - low fuel, seatbelt, lights-on, ice warning - fully functional, since those are driven separately through the same speaker. Two levels of the job are covered: unplugging the barrel connector completely (fastest, but the barrel then no longer lights as you insert the key), and cutting only the pink beep wire so that illumination is kept. An optional inline switch makes the change reversible. Expect to spend well under half an hour with basic hand tools. Adapted from a community writeup by Jpetrie on Civinfo (https://www.civinfo.com/threads/how-to-stop-beeping-with-key-in-the-ignition.75397/), including corrections from the follow-up discussion.
Honda Civic (FN2/FK) Short Shifter Kit Installation
This guide covers fitting an aftermarket quick-shift (short shifter) kit to the 2006-2010 Honda Civic, including the FN2 Type R and the FK 2.2 i-CTDi (Type S / CTS) and 1.8 petrol models. The kit replaces the three rubber base bushes at the foot of the gearstick with shorter metal bushes and adds an extension collar to the lever ball, tightening the front-to-back gear throw for a quicker, more positive shift (it does not affect the side-to-side movement). The mechanical work is quick, but the modified joint fouls the plastic gear-rod opening, so most of the effort goes into repeatedly test-fitting and filing away plastic until every gear selects cleanly. The kit is sold under several names; at the time of the thread Shortshiftuk supplied it for around 24 GBP against Japspeed at roughly 40 GBP. Adapted from a community writeup by Stevo M81 on Civinfo (https://www.civinfo.com/threads/how-to-install-a-japspeed-shortshifter.78160/), including corrections from the follow-up discussion.
Sideloading Third-Party Apps onto the Stock Honda Connect Head Unit
The Android-based Honda Connect head unit fitted to the facelift 9th-generation Civic and its siblings (Jazz, HR-V, Civic Tourer) runs a locked-down build of Android 4.0.4 that normally refuses to install anything outside Honda's own app centre. This guide explains how to roll the unit back to a state that accepts sideloaded APKs, load your own applications from a USB drive, and grant each app the permissions it needs to run and produce sound while the car is moving. Typical goals are replacing the sluggish factory Garmin navigation with Google Maps, Waze, or Sygic, or adding a media or dash-cam app. The procedure applies only to the genuine Android Honda Connect unit; pre-facelift Honda/Alpine systems and aftermarket stereos such as Kenwood units cannot run APKs. Firmware revision matters: an unlocked RC6 unit sideloads freely, whereas RC7 and RC8 firmware greys out the install button and can only be opened up by rooting through the rear service port. Adapted from a community writeup by Haltamer on Civinfo (https://www.civinfo.com/threads/guide-to-installing-3rd-party-applications-stock-headunit.386674/), including corrections from the follow-up discussion.
Restoring Hazy, Oxidized Headlight Lenses by Wet-Sanding and Polishing
Age and sun exposure leave polycarbonate headlight lenses cloudy, yellowed and dull, which scatters light output and makes the front of the car look tired. This procedure removes the failed outer layer of the lens by progressively wet-sanding through finer grits, then restores optical clarity with a plastic polish and seals the surface with wax. It applies to virtually any modern vehicle with clear plastic headlight housings, including Honda and Acura models such as the RSX, and costs a fraction of a replacement assembly. Read through every step before touching the lens, since the sanding stage permanently reshapes the surface. Adapted from a community writeup by PiNoY Ep3 SI on Club RSX (https://www.clubrsx.com/threads/how-to-fix-headlight-haze.678202/), including corrections from the follow-up discussion.
RevHard Turbo Kit Installation on the Honda Civic Si (EP3)
This guide covers installing the RevHard bolt-on turbocharger kit on the 2002-2005 Honda Civic Si (EP3) with the K20 engine. It walks through the complete conversion: prepping the engine bay, tapping the oil pan for the turbo return, mounting the turbo manifold and turbocharger, routing the intercooler and charge piping, plumbing the oil feed and return, setting up the wastegate and blow-off valve, wiring in standalone engine management, and priming the oil system before the first start. The kit's supplied instructions are famously sparse, and because the hardware mixes SAE fasteners with the car's metric hardware, plan to switch between both tool sets constantly. This is an advanced forced-induction project that involves welding, custom oil plumbing, and standalone tuning, so budget several days and get a proper tune before ever driving under boost. Adapted from a community writeup by jeenyusss on Club RSX (https://www.clubrsx.com/threads/diy-revhard-turbo-kit-install.703626/), including corrections from the follow-up discussion.
Honda Civic EP3: Custom MDF Cargo Deck and Front Speaker Adaptors
This guide covers building a replacement rear cargo deck for the Honda Civic EP3 hatchback out of 3/4" MDF, plus fabricating MDF adaptor rings so full-size front door speakers clear the factory openings. It is aimed at owners whose original load cover is missing, broken, or stolen, and at anyone who wants a flat platform on the rear shelf for mounting speakers or a free-air subwoofer instead of surrendering trunk space to a sealed box. The deck is templated to the exact shape of the factory cover, cut and sanded from MDF, wrapped in carpet, and either clipped in like the original or screwed down solid when it will carry a sub. The front adaptors solve the fact that the EP3 door opening is not a true circle and will not accept a real 6-1/2" driver bolted straight to the sheet metal. Note that mounting a subwoofer free-air in the deck is a compromise: at least one experienced follow-up poster warns it can stress the driver and limits sound quality versus a proper enclosure, so treat the sub-on-deck approach as a space-saving trade-off rather than a performance upgrade. Adapted from a community writeup by Ronnie on Club RSX (https://www.clubrsx.com/threads/update-diy-on-mdf-cargo-cover-front-speakers-adaptor-system-in.708441/), including corrections from the follow-up discussion.
Refinishing Faded Window Trim on the Acura RSX and Honda Civic (EP3)
The plastic trim piece that wraps the front corner of the door glass on the Acura RSX and Honda Civic EP3 loses its factory finish over time, going chalky, grey, and blotchy. Rather than buying replacement pieces, you can pull the trim, strip its failed coating, and repaint it for a fraction of the cost. The job is straightforward and needs only basic hand tools plus rattle-can primer and paint; nearly all of the elapsed time is waiting for coats to dry. This guide covers removing the side mirror to free the trim, prepping the plastic, and recoating it so the finish lasts. It applies to the mirror-corner window trim on the DC5 RSX and EP3 Civic and to the same failure on related Honda models. Adapted from a community writeup by minnSi on Club RSX (https://www.clubrsx.com/threads/diy-window-trim-repair-the-diy-we-all-been-waiting-for.809483/), including corrections from the follow-up discussion.
Acura RSX / Civic Si (K-Series) Clutch Replacement
This guide covers replacing the clutch on the K-series manual transaxle used in the Acura RSX (DC5) and Civic Si (EP3). Because the transmission bolts to the front of the transverse engine, gaining clearance means supporting the drivetrain from above, freeing the axles, and lowering the subframe rather than simply dropping the gearbox straight down. The job is worth doing at home for the labor savings, and it is the ideal time to install a performance clutch and fresh engine/transmission mounts while everything is exposed. Expect a full day of work and a variety of extension and swivel tools, since one bellhousing bolt near the starter is notoriously difficult to reach. Follow the steps in order on the way out, and reverse them on the way back in. Adapted from a community writeup by Jamdc5 on Club RSX (https://www.clubrsx.com/threads/diy-clutch-install.811379/), including corrections from the follow-up discussion.
MTEC Shift Spring Install (RSX / Civic Si Shifter Mechanism)
The MTEC shift spring kit replaces the factory detent springs inside the manual-transmission shifter mechanism to firm up gear selection. Once fitted, the shifter feels tighter and more precise, with noticeably less slop between gears; the trade-off is heavier effort, which is most obvious when selecting reverse. The kit ships in a sport version tuned for everyday driving and a stiffer race version aimed at auto-cross and drag use. This procedure covers removing the shifter assembly from the transaxle, opening it, swapping in the new springs, and sealing everything back up. It applies to the Acura RSX (DC5) and its Honda Civic Si (EP3) sibling, and pairs well with other shifter upgrades such as base and cable bushings. Only 6-speed cars have the reverse lock-out connector called out below. All required internal hardware and the washer stay with the car; you are only exchanging the springs. Adapted from a community writeup by Jamdc5 on Club RSX (https://www.clubrsx.com/threads/diy-mtec-shift-spring-install.811426/), including corrections from the follow-up discussion.
Wiring a Relay-Switched LED Light Bar to a Roof Rack
This guide covers adding a switched, relay-controlled LED light bar to a vehicle already fitted with a square-bar roof rack, using an Acura RSX as the example platform. The circuit is designed so the bar draws its heavy current directly from the battery through a fused relay, while a low-current trigger is tapped from the parking-light feed. Wiring the trigger to the parking lights means the bar can only be energized when the parking lights are on, so a switch accidentally left in the on position cannot flatten the battery. The result is a bright auxiliary light that can be unclipped and removed whenever the rack is needed for cargo, then reconnected plug-and-play. You should be comfortable running wire through a footwell grommet, crimping terminals, and reading a basic relay pinout before starting. Adapted from a community writeup by IBx1 on Club RSX (https://www.clubrsx.com/threads/diy-led-zombie-bar-on-thule-square-roof-rack.875737/), including corrections from the follow-up discussion.
Honda Fit (GD) Stainless Clutch Line and Delay-Valve Delete
This guide covers replacing the factory hydraulic clutch line on the manual-transmission Honda Fit (GD chassis, also badged Jazz) with a -3AN braided stainless hose. Because the new hose runs straight from the clutch master cylinder to the slave cylinder, it deletes the factory clutch delay valve (CDV) in the process. The CDV deliberately slows how quickly hydraulic pressure reaches the slave cylinder, which produces a soft, laggy engagement that is most noticeable pulling away in first gear. Removing it gives a crisper, more direct pedal and lets you feel the exact bite point for smoother launches and quicker shifts, while the rigid braided line further sharpens response. Note that this modification does not cure clutch shudder, which comes from the pressure plate and friction material rather than the hydraulics. Budget roughly 45 to 75 dollars for parts; the 12mm master-cylinder adapter is the hardest piece to source, so confirm it is an inverted flare before ordering. Adapted from a community writeup by apexanimal on FitFreak (https://www.fitfreak.net/forums/fit-diy-repair-maintenance/56664-diy-gd-clutch-hardline.html), including corrections from the follow-up discussion.
Adapting a K20Z3 Transmission to Fit a 2002-2004 Acura RSX
The K20Z3 is a favorite transmission upgrade among Acura RSX owners, largely because it carries a factory limited-slip differential that the base RSX gearbox lacks. Dropping one into an early 2002-2004 RSX is not a plug-in job, however: the vehicle speed sensor and speedometer drive differ from the donor Civic setup, so the case has to be opened and machined before the unit will function correctly. This guide walks through preparing and modifying a K20Z3 so it reads speed properly and accepts the RSX shift hardware. The speed-sensor portion is specific to 2002-2004 cars; a base 2005-2006 RSX can skip that machining, though every other step still applies to any RSX running a Z3 box. Plan on a full teardown, because all of the work happens inside the case. Adapted from a community writeup by cauQazn on Club RSX (https://www.clubrsx.com/threads/diy-k20z3-transmission-for-02-04-rsx.1148258/), including corrections from the follow-up discussion.
Acura RSX EPS Warning Light Retrofit and DTC Communication Enable
An RSX that has had an EPS (electric power steering) system fitted normally has no dashboard telltale for that system, so when the EPS control logic sets a DTC and shuts the assist down, the driver gets no indication and there is no lamp for a scanner to communicate with the BCU. That gap leads owners to swap the BCU on guesswork, often without fixing anything. This retrofit closes it by grafting an EPS indicator LED and its logo into the RSX instrument cluster and wiring the diagnostic lines so the system behaves like factory: the telltale lights with the ignition, clears within about two seconds when no faults are stored, and gives a path to read codes and reset the BCU. It applies to 2002-2006 Acura RSX (DC5) that carry an EPS setup, using cluster parts and the connector pinout from a 2002-2005 Honda Civic Si (EP3) or 2003-2005 Honda Civic Hybrid (EM2), whose factory manuals share identical wire colors and codes. Adapted from a community writeup by Cloneufc on Club RSX (https://www.clubrsx.com/threads/diy-eps-warning-light-conversion-and-eps-dtc-retrieval-functionality.1274219/), including corrections from the follow-up discussion.
Acura RSX Brake Pad Replacement (Front and Rear)
This guide covers replacing the front and rear disc brake pads on the Acura RSX (DC5), including the base and Type-S. It is written for a first-time brake job and assumes you can already raise the car and remove the wheels. The RSX front caliper is retained by a single lower guide bolt, and the rear by that bolt plus a bracket that captures the brake line, so the pads can be reached by swinging the caliper up rather than fully unbolting it. Doing this yourself takes roughly 45 minutes per axle once you are familiar with it and saves a shop's labor charge. The one point that trips up beginners is the rear caliper: its piston is a screw-in type that must be rotated as it is compressed, and its groove has to align with a tab on the new pad or the pad will wear unevenly and squeal. Read the whole procedure before starting, because the fronts and rears differ. Adapted from a community writeup by jp182 on Club RSX (https://www.clubrsx.com/threads/diy-brake-pad-replacement-not-for-56k.173870/), including corrections from the follow-up discussion.
DIY Amber City Lights in Honda Headlight Housings
City lights are the small amber or white marker lamps that glow inside a headlight housing, a look normally associated with JDM assemblies. Rather than buying a second set of headlights just for that feature, this guide shows how to graft an extra bulb socket into a standard USDM housing so a low-wattage bulb shines from within the reflector. The socket is salvaged from a common automotive side marker, mounted through the housing with a rotary tool, sealed against moisture, and wired to its own switch. The technique suits Honda Civic (EG) and CR-X del Sol headlights and adapts to most other Honda housings with room behind the reflector. Adapted from a community writeup by SMOOTHN on Honda-Tech (https://honda-tech.com/forums/lighting-107/smoothns-diy-city-lights-2163034/), including corrections from the follow-up discussion.
DIY Four-Point Roll Cage Fabrication for a Honda Civic
A roll cage protects the driver in a rollover or high-speed impact and lets you safely fit fixed racing bucket seats and a proper harness. This guide covers fabricating a four-point cage - a full-width main hoop behind the driver plus two rearward braces - for a lightweight Honda Civic used as an occasional track car rather than a daily driver. The four-point layout can later be extended with front hoops and door bars once the car becomes a dedicated race build. Because a cage is a safety-critical structure, every bend, notch, and weld must be done to a recognized standard; this build targets SCCA General Competition Rules compliance. Building your own cage costs roughly what a bolt-in kit does (a typical four-point kit runs around $650) but gives far better chassis integration and fitment, and you own the tube bender afterward. Bending and notching can be done at home, but the welding should go to a qualified welder. Adapted from a community writeup by BlackNDecker on K20A.org (https://www.k20a.org/threads/diy-roll-cage.110177/), including corrections from the follow-up discussion.
Automotive Electrical Wiring: Clean, Reliable DIY Accessory Installs
This guide covers the core tools, parts, and techniques for adding electrical accessories to a Honda CR-Z (and Hondas generally) with results that hold up better than a typical shop install. It applies to any 12V add-on job: dash cams, auxiliary lighting, upgraded horns, diffuser lights, and similar wiring. With a soldering iron, a handful of connectors, and an understanding of how to load circuits safely, even a first-timer can build clean, weatherproof, OEM-looking harnesses. The workflow moves from gathering the right supplies, through making strong soldered joints and weatherproof splices, to wiring a relay so high-draw accessories never overload a factory circuit, pulling switched power from the fuse box, and dressing the finished harness. Preserve every circuit's amperage limits and always fuse anything fed from the battery. Adapted from a community writeup by Koala Yummies on CRZ Forum (https://www.crzforum.com/threads/diy-electrical-tools-tips-techniques-parts.77194/), including corrections from the follow-up discussion.
Honda CR-Z HID Fog Light Conversion
This guide covers swapping the factory halogen fog lights on a second-generation Honda CR-Z for an HID conversion kit, using a 2011 EX as the reference car. Beyond the brighter output, owners commonly make the change because the stock halogen bulbs run hot; the HID setup measured noticeably cooler in the same housings. The job involves removing the front bumper to reach the fog light housings, transferring the factory wiring over to each ballast, fitting the new HID bulbs, and finding a safe home for the ballasts. Color temperature is personal preference: 6000K reads whiter/bluer while 4300K puts out more usable light on the road. No signal decoder or relay harness is required on this platform, since the kit runs as a straight ballast-to-bulb conversion. Budget extra care around the airbag crash sensors when mounting the ballasts. Adapted from a community writeup by jcrhee12 on CRZ Forum (https://www.crzforum.com/threads/diy-hid-fog-light-conversion.10034/), including corrections from the follow-up discussion.
Honda CR-Z Center High-Mount Brake Light (CHMSL) Flasher Install
This guide walks through adding a small flasher module to the center high-mount stop lamp (CHMSL, the third brake light) of the Honda CR-Z so the lamp pulses briefly each time you brake before settling. The aim is to catch the attention of a following driver and reduce the chance of being rear-ended. It fits the 2011-2016 CR-Z hatch and is an inexpensive, roughly half-hour job that taps into the existing third-brake-light wiring behind the rear trim. The module used here offers 37 selectable patterns, including an off setting, so you can tune how subtle or aggressive the effect is. Before starting, understand two things: flashing brake lights are not legal everywhere, so confirm the rules with your local transport authority; and the road-safety benefit is genuinely debated, with some researchers arguing that a flashing lamp can be misread or slow a following driver's response, so a restrained pattern is wiser than a constant strobe. Adapted from a community writeup by CR-Z Canadian on CRZ Forum (https://www.crzforum.com/threads/diy-center-brake-light-flasher-install.11142/), including corrections from the follow-up discussion.
Fitting a DC5 (RSX) Rear Diffuser to an 8th-Gen Civic Coupe (FG2)
This guide covers adapting a Top1 Motors rear diffuser to the eighth-generation Honda Civic coupe (FG2). The panel is molded for the Acura RSX / Honda Integra DC5 chassis, so it does not bolt straight on; fitting it to the Civic is a custom job that requires measuring, trimming, and drilling the diffuser, its brackets, and parts of the rear bumper. Done carefully, none of the trimming is visible from outside the car, and the finished piece mounts securely to the factory tie-bar location, the pinch welds, and the rear bumper-tab holes. Plan for a multi-day project: cutting to shape and dialing in the wing angle both take repeated test-fits. The steps below were carried out on the coupe; fitment on the sedan is unconfirmed. Because this involves fabrication rather than a bolt-on install, extra hands and more than a single drill will make the work far easier. Adapted from a community writeup by xander1212 on 8th Civic (https://www.8thcivic.com/threads/diy-top1-motors-dc5-diffuser-install-fg2.656612/), including corrections from the follow-up discussion.
Build a Scratch-Free Static Wheel Balancer (No-Mar Cones + Harbor Freight Stand)
This guide builds an inexpensive static wheel balancer that never touches the face of an alloy rim, then uses it to balance a mounted wheel and tire at home instead of paying a shop. The rig marries two off-the-shelf items: a No-Mar Cone Pack #6, which supplies a 1/2 inch Acme threaded rod and precision plastic centering cones, and a Harbor Freight Motorcycle Wheel Balancing Stand (item 98488), lightly modified so the fatter rod rides its bearings freely. The complete setup costs roughly $160 in parts, compared with about $15 per wheel at a tire shop, and leaves no scratches. It handles most car wheel-and-tire packages up to 11 inches (275 mm section width) wide and 29.5 inches tall, making it suitable for the Acura RDX and many other Honda and Acura vehicles. The method performs single-plane static correction only, so it lacks the dynamic and road-force measurement of a shop machine; even so, a quality wheel and tire will come out running smoothly. Adapted from a community writeup by 737 Jock on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/diy-wheel-balancing-scratch-free-777838/), including corrections from the follow-up discussion.
Honda/Acura K-Series Cylinder Compression Test
A compression test is a quick diagnostic that reveals how well each cylinder is sealing and, by extension, the mechanical health of the engine's valves, rings and head gasket. It is worth running if the engine is burning oil or coolant, has been over-revved or missed a shift, is misfiring, or simply as periodic preventive maintenance to track wear over time. This guide covers the procedure on Honda/Acura K-series engines as fitted to the Acura RSX - the K20A3 in the base car, the K20A2 in the Type-S, and the later K20Z1 - and applies equally to related K20 and K24 engines that use coil-on-plug ignition. The work needs only basic hand tools plus a screw-in compression gauge and takes well under an hour; the one habit that keeps it painless is staying organized so every coil, bolt and plug goes back on its own cylinder. Adapted from a community writeup by Ju5t Ep3 Pr4ct1c3 on Club RSX (https://www.clubrsx.com/threads/diy-compression-test.316283/), including corrections from the follow-up discussion.
Acura RSX / Honda Civic Si (EP3) Front Brake Rotor Replacement
Worn, scored, or pulsing front brake rotors on the Acura RSX (DC5) and the closely related Honda Civic Si (EP3) can be replaced at home with common hand tools in well under an hour per side. This guide covers lifting and supporting the car safely, removing the caliper together with its mounting bracket, defeating the two stubborn screws that pin each rotor to the hub, cleaning the hub, and reassembling to the correct torque. One point trips people up: the caliper bracket wraps completely around the rotor, so it must come off entirely. You cannot slide a rotor out by pulling only the caliper slide bolts as you might on some other cars. Because these parts are what stop the vehicle, torque every fastener to spec and inspect the hub before refitting. Adapted from a community writeup by Ju5t Ep3 Pr4ct1c3 on Club RSX (https://www.clubrsx.com/threads/diy-front-rotor-s-removal-replacement.335226/), including corrections from the follow-up discussion.
Fiberglass False-Floor Subwoofer Enclosure for a Honda Accord Trunk
This guide covers building a molded fiberglass subwoofer enclosure that sits flush in the spare-tire well of a 7th-generation Honda Accord trunk, forming a hidden false floor with a recessed subwoofer and concealed space for a capacitor and power/ground distribution blocks. The technique lets you follow the exact contour of the tire well so the finished box wastes no cargo room and looks factory-integrated once carpeted. It targets a sealed internal volume of roughly 1.5 cubic feet, so the same method scales to other trunks by re-measuring the well and adjusting the frame. Expect a multi-week project driven by cure times rather than labor hours, and treat it as a genuine composites job: mix resin in small batches, work in ventilated conditions, and plan on a leak test before final assembly. No prior fiberglass experience is strictly required, but patience and a tolerance for mess are. Adapted from a community writeup by 98EXL on DriveAccord (https://www.driveaccord.net/threads/diy-fiberglass-false-floor-wip-got-cable-modem-go-bake-a-cake-get-fiber.5290/), including corrections from the follow-up discussion.
Honda Accord Coupe (8th Gen) OEM Fog Light Installation
This guide covers installing genuine OEM fog lights on the 8th-generation Honda Accord Coupe (2008-2012). The factory kit bundles the fog housings, the short bumper-level wiring harnesses, the replacement light-control stalk with a fog switch, and the mounting and grounding hardware. Trim level determines how much work is involved: EX and EX-L coupes already have the fog wiring routed behind the bumper, so the job is largely mechanical, while the LX-S has the molded fog openings but no factory wiring, meaning it needs the harness added before the lights will function. Note that even EX and EX-L cars ship with a plain stalk that lacks the fog switch, which is why the OEM kit supplies a new stalk. Aftermarket eBay kits often route to a separate dash switch and are a messier install, so an OEM kit is preferred for a factory-clean result. Doing this yourself avoids paying a shop and typically takes between 1.5 and 3 hours. Adapted from a community writeup by bruceleroy on DriveAccord (https://www.driveaccord.net/threads/diy-fog-light-installation-for-8th-gen-coupe.22936/), including corrections from the follow-up discussion.
Honda CR-Z Footwell LED Brightening Modification
The CR-Z's footwell (floor) accent LEDs are fitted from the factory on GT/Sport trims in Europe and EX trims in North America, but each footwell LED sits behind a black or dark grey plastic cap that acts as a heavy filter. Because of that filter the blue glow is barely visible, unlike the center cup-holder light, which uses a translucent white cap and reads much brighter. This guide restores the advertised footwell glow by exposing the two footwell LEDs and either opening their dark caps or replacing them with the white cup-holder cap. It applies to the Honda CR-Z (2010-2011 and later), and base models that lack the LEDs still carry the mounting holes so the assemblies can be added. The job costs nothing if you drill the existing caps and typically takes only a few minutes per side. Adapted from a community writeup by YLA on CRZ Forum (https://www.crzforum.com/threads/diy-brighter-floor-lights-for-gt.1037/), including corrections from the follow-up discussion.
Honda CR-Z Retractable Cargo Hooks Installation
Adding a pair of retractable tie-down hooks to the CR-Z cargo bay keeps bags and loose items from sliding around in the shallow trunk. This install mounts a set of Audi OEM spring-loaded hooks (they fold flat when not in use) directly to the metal housing of the factory retractable cargo shade, so nothing protrudes and the holes stay hidden beneath each hook base. Because the shade housing is a stressed part with an internal spring mechanism, the shade must be pulled out and correctly re-tensioned afterward, which is the fiddly part of the job. This guide applies to the Honda CR-Z (2011-2016) with the factory retractable cargo cover. Read the whole procedure before starting so the spring reassembly does not catch you off guard. Adapted from a community writeup by ghost151 on CRZ Forum (https://www.crzforum.com/threads/diy-trunk-bag-hooks.1848/), including corrections from the follow-up discussion.
Honda CR-Z (ZF1) Lowering Spring Installation
This guide covers fitting aftermarket lowering springs to the Honda CR-Z (ZF1), replacing the factory coils with a shorter, stiffer set such as Swift, Eibach or Tein to cut ride height and reduce body roll. The front struts are coilover-style units that must be taken apart on a strut spring compressor, whereas the rear springs sit separately from the dampers and usually need little or no compression to swap. A theme that runs through the whole job is the bump stop: once the car settles lower the factory bump-stop gap closes up, so many kits call for trimming the stops to keep suspension travel and ride quality intact. Always follow the specific spring maker's instructions on whether the front, rear, or both need trimming, since it varies by kit and car. Plan on roughly two to three hours with air tools, or most of a day working by hand. On a CR-Z fitted with Swift springs, ride height measured from the ground to the fender fell from about 655/660mm at the front and 665/670mm at the rear to 625/630mm front and 636/640mm rear. Adapted from a community writeup by AlexS2200 on CRZ Forum (https://www.crzforum.com/threads/diy-lowering-springs.3215/), including corrections from the follow-up discussion.
Honda CR-Z Tein High Tech Lowering Spring and Rear Wheel Spacer Install
This guide covers installing a set of Tein High Tech lowering springs on the Honda CR-Z (2011, ZF1) together with a pair of 20mm H&R DRM wheel spacers on the rear wheels only, using the factory OEM wheels. The Tein set is advertised at roughly 0.8 in front and 0.9 in rear; once the suspension settles, expect closer to a full 1 in of drop. The rear spacers push the back wheels out to sit flush with the fenders and even out the wheel gap without touching the fronts. The result is a modest, daily-drivable drop with noticeably less body float, reduced body roll, and a more planted feel, while keeping OEM ride comfort. The rear job is straightforward thanks to the solid rear axle; the front requires removing and disassembling each strut, so a good spring compressor and care are essential. Plan on a proper alignment afterward, since the drop typically leaves the front with slightly positive camber and toe out of specification. Adapted from a community writeup by kgb_m3&z on CRZ Forum (https://www.crzforum.com/threads/tein-high-tech-springs-20mm-h-r-spacers-installed-with-oem-wheels-pics-brief-diy.4774/), including corrections from the follow-up discussion.
Honda/Acura Sway Bar Upgrade and Cross-Model Swap Guide (1988-2005)
This guide explains how to upgrade the front and rear anti-sway (stabilizer) bars on 1988-2005 Honda and Acura sport compacts by fitting thicker factory bars taken from other models in the family. Across most Civic, CRX, Integra, Del Sol, and Prelude generations the stabilizer bars share a common length and use the same lower-control-arm mounting bolt, so a stiffer bar from one chassis will usually reach the mounting points on another. What actually differs between models is the bar diameter, the end links, the frame or subframe brackets, and whether the car left the factory with the rear body mounts a sway bar needs. A clean install therefore comes down to pairing the bar with the right control arms, brackets, and end links, and sometimes adding mounts a base model never had. The steps below cover choosing a donor bar by diameter, sourcing the matching hardware, dealing with trims that shipped without a rear bar, drilling or shimming the subframe where needed, and correcting the small camber change a control-arm swap introduces. It applies broadly to 1988-1995 Honda Civic and CRX, 1990-2001 Acura Integra, the Del Sol, and third- and fourth-generation Prelude, with notes on later EK Civic and the RSX. Adapted from a community writeup by remoer on D-Series.org (https://www.d-series.org/threads/honda-acura-supension-swap-guide.69263/), including corrections from the follow-up discussion.
Diagnosing a Non-Rotating Honda B20A Short Block Before Installation
This guide covers how to methodically diagnose a Honda engine that will not turn over by hand before it ever goes into the car. The worked example is a used JDM B20A acquired for a third-generation Prelude S-to-Si (carburettor-to-fuel-injection) conversion, where the freshly assembled short block locked solid and even a long breaker bar would not move the crankshaft. The aim is to find the cause in the cheapest possible order, ruling out the valvetrain, then the transmission, then rust-stuck rings, before ever committing to disassembly and a rebuild. It walks through separating the symptom from its cause, soaking the cylinders to free rings that have seized to the bores, dropping the oil pan and pulling the head to read the condition of the journals, bores and fasteners, and finally judging whether the block is salvageable. The same approach applies to any Honda A-series or B-series longblock bought used, where extended storage without oil is a frequent cause of seizure. Adapted from a community writeup by danktank on PreludePower (https://www.preludepower.com/threads/danks-s-si-conversion-progress-thread-start-up-vid-on-page-10.290955/), including corrections from the follow-up discussion.
Acura CL (1G) Power Window Regulator and Motor Replacement
The power window regulator on the first-generation Acura CL (1997-1999) is a known weak point, and the driver's-side unit in particular tends to fail more than once over a car's life. This guide covers removing the failed regulator-and-motor assembly through the door's service opening and installing a replacement, using the electrically driven glass itself to help set the mechanism's position. The driver's regulator on the 1G CL interchanges with the 1994-1997 Accord two-door driver's side, so replacement units are widely available; expect budget online parts to start around $37.95 plus shipping and name-brand parts from a chain store to run closer to $100. Doing this yourself instead of paying a shop can save on the order of $300. Read the failure notes and the reply corrections below before buying a part, since not every replacement restores the one-touch-down feature and cheaper units have a reputation for short life. Adapted from a community writeup by mitch14 on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/window-regulator-replacement-diy-762884/), including corrections from the follow-up discussion.
Acura RDX Windshield Wiper Insert (Refill) Replacement
The rubber squeegee on a windshield wiper wears out long before the plastic frame that holds it, so on the first-generation Acura RDX you can restore full wiping performance by replacing only the rubber refill rather than buying a whole new blade assembly. This procedure covers pulling the worn insert, transferring its two curved metal stiffeners into the new refill, and locking the fresh insert back into the existing frame. Refills run only a few dollars each versus roughly $30-$35 for a complete assembly, and the frame is fully reusable. Both wipers are serviced identically; expect the first one to take the longest as you learn the tab-and-slot sequence. No tools are needed. Left refers to the driver side and right to the passenger side throughout. Adapted from a community writeup by 737 Jock on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/diy-replace-windshield-wiper-794516/), including corrections from the follow-up discussion.
Acura RDX Shift Knob and Shift Indicator Bulb Replacement
This guide covers removing the automatic-shifter knob and replacing the small shift-position indicator bulb on the first-generation Acura RDX. Do it to swap a worn or discolored factory knob for a leather one, to restore a burned-out gear-position indicator that no longer lights the selected gear, or as the first stage of pulling the upper console cover. No special tools are needed beyond plastic trim picks and a Phillips screwdriver, and the whole job is reversible with a few snap-fit and screw connections. You will move the shifter through several positions with the engine off, so the key must be turned on to release the shift lock, and the black button on top of the lever unlocks it as required. Adapted from a community writeup by 737 Jock on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/diy-remove-replace-shift-knob-shift-indicator-light-803112/), including corrections from the follow-up discussion.
Acura RDX Climate Control (HVAC) Off-Season Maintenance and Baseline Temperature Testing
Vehicle climate-control systems suffer most when half of the system sits idle for an entire season. On the first-generation Acura RDX (2007-2012), the air-conditioning refrigerant and the lubricating oil it carries only move while the compressor turns, and the heater core only sees coolant flow when its inlet valve is driven fully open. Leaving either half dormant for six months invites dried O-ring seals, gradual refrigerant loss, internal corrosion, and eventually a pinhole heater-core leak - repairs that climb into the hundreds or thousands of dollars because the compressor and evaporator are buried behind the dashboard. This guide covers two related things: a simple off-season exercise routine that keeps refrigerant, oil, and coolant circulating year-round, and two baseline temperature tests (one for the A/C, one for the heater) that let you catch a developing fault early by comparing today's output against a recorded reference. It applies to the first-generation Acura RDX and, in principle, to any modern Honda or Acura HVAC system that shifts into manual control at its temperature extremes. Adapted from a community writeup by dcmodels on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/diy-how-maintain-climate-control-system-805682/), including corrections from the follow-up discussion.
Acura RDX Front Door Panel Removal and Mid-Range Speaker Replacement
This guide covers removing the front interior door panel on the first-generation Acura RDX and swapping out the factory mid-range door speaker. The original mid speakers in these doors are prone to age-related failure, and a worn unit typically sounds thin, muffled, or distorted. Replacement is inexpensive and needs nothing beyond basic hand tools and a set of plastic trim picks, which makes it a reasonable first project for someone new to interior work. The job breaks down into detaching the tweeter, removing the door-pull hardware, unclipping the panel, disconnecting the latch cable and power connectors, and then unbolting and unplugging the old speaker before fitting the new one and reassembling. It applies to the 2007-2012 RDX. Adapted from a community writeup by 737 Jock on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/diy-remove-door-interior-panel-replace-door-speaker-830292/), including corrections from the follow-up discussion.
Acura 1G TL Automatic Transmission Strainer (Filter) and Fluid Service
This procedure covers replacing the automatic transmission intake strainer (often called the tranny filter or screen), renewing its O-ring and pan gasket, and refilling with fresh fluid on the first-generation Acura TL (2.5TL and 3.2TL). Acura classifies the strainer as a lifetime pump intake screen with no scheduled replacement interval, which is why many dealers will tell you the car has no filter and offer only a drain-and-fill. In reality a mesh strainer is bolted to the valve body, and on high-mileage cars it collects enough sludge and metal debris to cause harsh or late 1-2 and 2-3 shifts and highway shudder. Cleaning it out and installing fresh ATF-Z1 typically restores noticeably smoother shifting. Note that the 2.5 and 3.2 do not share parts: the 2.5 uses a smaller pan (different gasket) and a strainer with a shorter intake tube, so order by model year and trim. Adapted from a community writeup by KaMLuNg on AcuraZine (https://acurazine.com/forums/1g-tl-problems-fixes-118/tranny-filter-screen-diy-591042/), including corrections from the follow-up discussion.
Acura RSX: Mounting a Gauge Inside the Center A/C Vent
This project fabricates a custom wooden adapter that seats a round gauge inside the center dashboard A/C vent of an Acura RSX (DC5), giving a clean, integrated look without an A-pillar pod or steering-column mount. The adapter is built from two stacked wood pieces: a front ring that fills the vent opening and holds the gauge, and a backing piece that carries the vent's mounting tabs and screw holes so the assembly bolts back onto the climate control panel. It suits any 2-1/16 in. gauge (boost, EGT, and similar) and permanently repurposes that vent, so airflow from it is lost. Expect the sanding-to-fit work to consume most of the build time. Adapted from a community writeup by achilles08 on Club RSX (https://www.clubrsx.com/threads/diy-guide-gauge-in-a-c-vent.384064/), including corrections from the follow-up discussion.
Acura RSX (DC5): S2000 Push-Start Button Installation
This guide covers adding a Honda S2000-style push-start button to a 2002-2006 Acura RSX (DC5), including the Type-S. The button does not replace the ignition key: you still insert the key and turn it to the ON position so the immobilizer is satisfied, then press the button to crank the starter instead of twisting the key all the way to start. Electrically, the button drives a small automotive relay whose contacts briefly bridge the starter (crank) wires at the ignition switch, reproducing the momentary key-to-start action. The result is a factory-looking push-button start that still works alongside the original key. Decide on the button's mounting location before wiring, since several dash positions work and each changes how far the leads must run. Read the follow-up discussion carefully: the simple single-relay approach leaves some ignition circuits live during cranking and can stress the accessory (radio) circuit, so review the warnings and consider the two-relay refinement raised by later posters. Adapted from a community writeup by KSMatic on Club RSX (https://www.clubrsx.com/threads/diy-guide-how-to-install-s2000-push-start-button-visual-guide.389791/), including corrections from the follow-up discussion.
Building a K24/K20A2 "Frankenstein" Hybrid Engine
The K24 "Frankenstein" is a torque-focused hybrid that mates a K20A2 cylinder head and its top-end hardware to a larger-displacement K24 short block, giving an RSX Type S the K24's low-end grunt while keeping the high-rpm K-series valvetrain. The K24 bottom end is pulled from a common CR-V (Accord, Element, or TSX blocks also work), and the head, cam caps, VTC actuator, timing set, oil pump, oil pan, oil cooler, windage tray, and knock sensor migrate over from the K20A2. On a chassis dyno the combination has shown around 185 whp with roughly 30 lb-ft more torque spread across the band, and it makes a strong foundation for later boost, comfortably capable of 300+ whp. Expect real teardown work, precision machining for the oil cooler, and careful reassembly with correct torque sequences; this is an expert-level project. Doing the labor yourself saves the roughly $2500 a shop would charge for the same work before parts and machining. Adapted from a community writeup by compdoc777 on Club RSX (https://www.clubrsx.com/threads/diy-k24-frankenstein-build.392509/), including corrections from the follow-up discussion.
Acura RDX (3G) Custom Phone-Mount Bracket
This guide covers fabricating a custom phone-mount bracket for the third-generation Acura RDX. The factory console offers few good options: vent-clip holders choke the air flow, and most surfaces either block a vent or a control, including the Start/Stop idle-inhibitor button. The solution is a small bracket that anchors to the lower console and presents a flat pad onto which any aftermarket cradle can be bolted, positioned so it keeps the vents clear and leaves the idle-inhibitor button within reach. The bracket is bent from inexpensive flat metal, padded with rubber matting where a knee might rest, and wrapped in vinyl film so it blends with the surrounding trim. This is an interior accessory build that needs only basic fabrication tools and an hour or two of work. Adapted from a community writeup by SH4RKT00TH on AcuraZine (https://acurazine.com/forums/3g-rdx-diy-faq-460/phone-mounting-bracket-diy-997598/), including corrections from the follow-up discussion.
Acura Integra Short Shifter Installation (94-01 GSR/RS/LS)
A short shifter reduces the distance the lever travels between gears, so each change takes less time and the throw feels tighter and more precise; many kits also lower the seating height of the knob for a cleaner look than the tall factory lever. This procedure covers swapping the internals of a short shifter onto the third-generation Integra shift assembly and reinstalling it, using a DC Sports unit as the example. It applies to 1994-2001 Integra models (GSR, LS, RS) but not the Type R, which uses a different setup. The work is done from underneath the car and mostly involves transferring the rubber boot, plastic ring, and retaining plate from the original shifter to the new one, then reassembling. Adapted from a community writeup by BlackKnightGSR on Team Integra (https://www.team-integra.net/threads/g3-short-shifter-install.342610/), including corrections from the follow-up discussion.
Silencing Rear Deck (Parcel Shelf) Bass Rattle in Honda and Acura Sedans
The rear parcel shelf (rear deck) on many Honda and Acura sedans buzzes at low frequencies when the subwoofer is driven hard, because the shelf taps against the body at a few loose contact points. This guide walks through a quick, fully reversible fix that pads those points so the panel is held firmly and stops resonating. It targets the first-generation Acura TLX, but owners report the same underlying issue and the same cure across several generations of Accord, TL, and TSX. The repair needs no permanent modification and typically removes about 95 percent of the rattle, making it a good choice for anyone who leases or simply does not want to commit to full sound deadening. If your car is still under warranty, note that a factory fix exists as well (see the tips). Adapted from a community writeup by mani on AcuraZine (https://acurazine.com/forums/5g-tlx-problems-fixes-420/diy-rear-deck-bass-rattle-928441/), including corrections from the follow-up discussion.
Honda Fit Headlight Bulb Replacement (GD/GE)
Replacing a burned-out headlight bulb on the first-generation Honda Fit (GD chassis, roughly the 2007-2008 model years, sold as the Jazz in some markets) is straightforward once you know the trick: the bulb is reached from behind the front wheel, not from under the hood. Owners who attempt the engine bay first often assume the entire headlight assembly, or even the radiator, must come out, which is not the case. This guide covers removing and refitting the H4 (9003) low/high-beam bulb through the front wheel well, dealing with the awkward wire spring that traps the bulb, and re-aiming the beam afterward. Later GE-chassis cars (2009 onward) let you swap the same bulb from above with the hood open, so those owners can skip the jacking steps. The job applies to both sides, though the driver side is tighter because of an extra cable run behind the housing. Budget roughly 30 minutes to an hour for the pair, and expect the first side to take longer while you learn the clip. Adapted from a community writeup by Sid 6.7 on FitFreak (https://www.fitfreak.net/forums/fit-interior-exterior-illumination/36510-diy-changing-headlight-bulbs.html), including corrections from the follow-up discussion.
Adding an Auxiliary (AUX) Input to a Base Honda Fit
The base-trim Honda Fit (Jazz) ships without the front auxiliary input that the Sport trim uses, yet its head unit already carries the wiring provision on the rear B connector. This guide adds a working 3.5mm aux jack so any phone or MP3 player can feed the factory stereo through its AUX source. Two paths are covered: a low-cost build using a four-conductor CUI panel-mount jack wired directly to the B connector, and an OEM route that installs the genuine Sport aux jack for a capped, factory appearance. Both require pulling the head unit and center console to reach the connector and the mounting point, plus some soldering or crimping. Once done, the radio's AUX button becomes fully functional and the detection line lets it switch sources automatically when a plug is inserted. Applies to the GD-generation Fit/Jazz base models that lack the factory jack. Adapted from a community writeup by smeister on FitFreak (https://www.fitfreak.net/forums/fit-interior-modifications/6846-diy-auxiliary-base-fit.html), including corrections from the follow-up discussion.
Molded Fiberglass Stealth Subwoofer Enclosure for the Honda Fit
This guide covers building a molded fiberglass subwoofer box that follows the contour of a rear quarter cavity in a Honda Fit (Jazz), giving a near-OEM, low-profile install that can preserve most of the cargo area and, depending on the location chosen, the spare tire. Rather than a simple rectangular MDF box, the enclosure is laminated directly against the car's interior so it hugs the trunk sidewall and disappears behind matching carpet. The technique combines an MDF structural baffle with fiberglass skins, so it applies to first- and second-generation Fit models and, in principle, any vehicle with a suitable rear cavity. You would do this to reclaim usable space, achieve a factory-stealth look, and tune internal volume precisely to a chosen driver. Expect fabrication skill, patience with sanding, and multiple cure cycles. Adapted from a community writeup by joe d on FitFreak (https://www.fitfreak.net/forums/fit-interior-modifications/8229-diy-stealth-fiberglass-sub-box.html), including corrections from the follow-up discussion.
Honda Civic CRX Rear Drum-to-Disc Brake Conversion (Scarebird Adapter Kit)
This guide covers converting the rear drum brakes on a first-generation Honda Civic CRX to disc brakes using a Scarebird adapter bracket kit together with rear disc calipers and rotors sourced from later Honda models such as the Integra. Many economy Hondas of this era left the factory with rear drums that are adequate for the street but limit performance and heat capacity on track. The adapter mounts to the original backing-plate surface and repositions late-model rear disc hardware onto the CRX spindle so the components line up correctly. The result is an inexpensive, reliable upgrade -- one build was completed for under $500 including stainless lines -- that has proven durable under repeated hard track use, including sustained stops from well over 100 mph. Because the kit ships without instructions and depends on mixing parts from several models, the trickiest part is identifying which parking brake cables, lines, and small hardware actually fit; this guide consolidates the part choices that worked so you can skip much of the trial and error. Adapted from a community writeup by rallyrcr on Honda-Tech (https://honda-tech.com/forums/suspension-brakes-54/civic-crx-scarebird-rear-brake-disk-conversion-review-instructions-3252027/), including corrections from the follow-up discussion.
Polishing Cast Aluminum Parts to a Mirror Finish
This guide covers restoring a dull, weathered piece of cast aluminum to a bright mirror finish using progressively finer abrasives followed by machine buffing. The method suits engine-bay dress-up items such as coolant necks, intake manifolds, brackets, and covers on Honda and Acura builds, and works on virtually any cast-aluminum casting. Because aluminum is soft, the earliest coarse stages do double duty: they flatten the rough as-cast skin and correct the shape of the part, while every finer grit that follows exists only to erase the scratch pattern left by the one before it. Expect the very first stage to eat the bulk of the total effort; the finishing steps go quickly by comparison. Done patiently, the result is a show-quality surface achieved entirely with hand tools and a drill or grinder. Adapted from a community writeup by fosach1 on HondaSwap (https://www.hondaswap.com/threads/polishing-aluminum-step-by-step.157929/), including corrections from the follow-up discussion.
Honda Accord Interior LED Bulb Conversion (Dome, Map, and Door Courtesy Lights)
Replacing the factory incandescent interior bulbs in a 2006 Honda Accord with LEDs changes the cabin light color and gives a cleaner, whiter (or custom-colored) look while running cooler and drawing less current than the stock lamps. This procedure covers the three user-serviceable interior fixtures: the door courtesy lights, the dome light, and the overhead map lights. No wiring changes are needed, so it suits a first-time DIYer and typically takes well under half an hour. Choose a single color throughout or mix by location; keep in mind that colored light (especially blue) can wash out printed detail if you rely on the map lights for reading at night. Adapted from a community writeup by mnkyman on DriveAccord (https://www.driveaccord.net/threads/diy-interior-accent-leds.8907/), including corrections from the follow-up discussion.
Acura CL (1G) Front and Rear Spring and Strut Replacement
This guide covers replacing the front and rear springs and struts/shocks on the first-generation Acura CL, the procedure most owners follow when fitting lowering springs or new dampers such as Neuspeed, KYB, Eibach, Ground Control or similar. It walks through lifting and supporting the car, separating each strut, safely transferring the coil spring to the new unit, and reinstalling everything front and rear. The front corners are relatively straightforward; the rear is where this job earns its reputation, because the angled rear lower mounting bolt tends to corrode into its bushing and shear off, turning a few-hour task into a multi-day bushing replacement on rust-belt cars. Read the entire guide, including the contingency for a snapped rear bolt, before you begin, and pre-soak the fasteners for several days. Recruit a helper. Adapted from a community writeup by klepto on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/spring-shock-install-470656/), including corrections from the follow-up discussion.
DIY Surface Rust Repair and Touch-Up Repaint
This guide covers repairing surface rust on painted body panels and blending in a fresh touch-up repaint, using inexpensive aerosol materials rather than a body shop. It suits shallow corrosion on doors, trunk lids, and fenders of Honda and Acura vehicles, such as the 1996 Acura 3.2TL the work was originally done on. The goal is to stop and hide light surface rust and restore a matching finish for roughly the cost of the paint kit (under $100), while understanding its limits: this is a cosmetic surface repair, not a cure for panels that rust has eaten through. Where a panel is perforated, replacing the metal is the durable fix, and follow-up discussion in the thread rightly cautions that filler over unsound metal is temporary. Adapted from a community writeup by SupraManAG on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/diy-rust-removal-60pic-477888/), including corrections from the follow-up discussion.
Honda Fit (GE8) Base Model OEM Map Light Retrofit
Base-trim second-generation Honda Fit (GE8) cars, including the base models sold in Canada, ship without the overhead map/reading lights fitted to Sport and navigation trims. The roof, however, still carries the two threaded mounting holes and the dome-light circuit needed to add them, so the missing lamp can be retrofitted with genuine Honda OEM parts for a factory-correct result. This guide covers cutting the headliner opening, wiring the map light base into the existing dome-light feed, and optionally tying it into the door-controlled circuit so the lamps also switch on whenever a door opens or you use keyless entry. It applies to GE8 Fit hatchbacks (roughly 2009-2013) that lack the factory map light. Adapted from a community writeup by dela on FitFreak (https://www.fitfreak.net/forums/2nd-gen-ge8-specific-fit-interior-modifications-sub-forum/54666-english-diy-maplight-base-ge.html), including corrections from the follow-up discussion.
Wings West Lip Kit Install on the First-Gen Acura CL
This guide covers assembling a complete Wings West lip kit on a first-generation Acura CL by combining pieces originally designed for several Honda chassis. The front lip is the Wings West CL Type R piece; the side skirts are the Accord W-Type units, and the rear valance is the Accord W-Type skirt. Because the skirts and rear lip were built for the Accord, each needs light trimming to sit correctly on the CL, and the three pieces sit at slightly different heights, so alignment is as much about patience as it is about hardware. The payoff is a lower, more finished stance without touching the factory bodywork underneath. This writeup applies to the 1997-1999 Acura CL and reuses commonly available Accord and CL Type R aero pieces. Adapted from a community writeup by gmsron on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/gmsrons-lip-kit-help-measurements-pics-diy-faq-495451/), including corrections from the follow-up discussion.
Honda Civic (8th Gen) Headlight and Position Light Bulb Replacement
This guide covers replacing the front headlamp and position-light bulbs on the eighth-generation Honda Civic five-door (2006-2011), including the 1.8 petrol, the 2.2 i-CDTi diesel and the FN2 Type R, where the car is fitted with standard halogen lighting. It explains which bulbs the car actually uses (the printed handbook lists them incorrectly) and walks through the easy jobs, the main beam and side lights, as well as the genuinely awkward dipped-beam bulb on the coolant-tank side. Doing it yourself takes roughly one to two hours the first time and well under an hour once you are familiar with it, versus a workshop visit. Cars delivered with factory HID/xenon headlamps use different bulbs and a different procedure and are not covered here. Adapted from a community writeup by jw on Civinfo (https://www.civinfo.com/threads/how-to-replace-headlight-bulbs-front-position-light.483/), including corrections from the follow-up discussion.
Honda Civic Front Fog Light Kit Installation (8th Generation, 2006 onward)
Adding factory-style front fog lamps to an eighth-generation Honda Civic (2006 onward) that left the showroom with blanking plates is a satisfying weekend project that restores a genuine OEM look and avoids the substantial labour charge a dealer asks for the same work. This guide covers the complete Honda fog light kit, which comprises the two lamp units, the wiring loom, the relay and its bracket, the replacement indicator and lighting stalk, and the fuse. The job strings together several sub-tasks: taking off the front bumper, drilling the marked apertures, seating the lamps from behind, routing the loom through the wheel arch into the cabin, mounting the relay, tapping into the fuse box, and swapping the column stalk. No single step is hard, but the bumper has to come off because the lamps seat from the rear and the drilling guides are moulded on the inner face. Set aside roughly two hours and work patiently, since most of the front end is held by clips that break if forced. The lamp units take H11 bulbs. Adapted from a community writeup by civicsport on Civinfo (https://www.civinfo.com/threads/how-to-fog-lights-installation.510/), including corrections from the follow-up discussion.
Honda Civic Full In-Car Entertainment (ICE) System Install
This guide covers a complete in-car entertainment (ICE) build for a Honda Civic: upgraded speakers, external amplification, an in-cabin powered subwoofer, rear-seat video screens, a games console and DVD player, and an iPod digital interface. It suits owners who want a full audio-and-video system without sacrificing boot space, since the amplifiers and sub are hidden beneath the front seats. The build is shaped by one key constraint - the factory head unit has no pre-amp (RCA) outputs - so signal is taken from the speaker wiring through high-level inputs throughout. Expect a substantial job spread over a weekend, with cable routing (especially the power feed through the bulkhead) taking far longer than mounting the components themselves. Adapted from a community writeup by Swindon Japster on Civinfo (https://www.civinfo.com/threads/how-to-install-an-entire-ice-system.5606/), including corrections from the follow-up discussion.
Fitting an HKS Racing Suction Reloaded Intake Kit to the Honda Civic Type R (FN2)
This guide covers installing the HKS Racing Suction Reloaded (RSK/RSR) open induction kit on the Honda Civic Type R FN2 (K20Z4). The kit replaces the factory airbox and intake tract with an exposed cone filter and revised pipework, which sharpens intake response and gives the engine a noticeably louder, more aggressive note under load, particularly when VTEC engages. Realistically it is a bolt-on, sound-and-feel modification rather than a power upgrade, and it can be completed on the driveway in about an hour with basic hand tools. The trickiest parts are the small fixing bolt that is tightened blind behind the intake pipe and the bracket bolt for the OEM cold-air feed, which can be stubborn to break loose. Coolant loss is minimal because only one short crossover pipe is removed. This procedure combines the original photo walkthrough with the fixes, part clarifications and troubleshooting that surfaced across the discussion, so it also covers filter orientation, MAF sensor handling and what to do if the engine management light appears. Adapted from a community writeup by Loxy on Civinfo (https://www.civinfo.com/threads/how-to-fit-a-hks-racing-suction-reloaded-kit-to-an-fn2.47318/), including corrections from the follow-up discussion.
Honda Fit (GE8) HomeLink and Ambient Light Retrofit Using an Acura TSX Overhead Console
This guide covers retrofitting factory HomeLink, a door-triggered map light, and a color-matched ambient LED into a second-generation Honda Fit (GE8) while preserving the navigation system's voice-control microphone. The build replaces the Fit's plain overhead map-light housing with a HomeLink-equipped console pulled from a compatible Honda or Acura, using a 2004-2008 Acura TSX unit as the reference donor, so a cluster of loose garage-door remotes can be retired in favor of integrated buttons above the visors. It applies to USDM GE8 Fit Sport models with Navigation, which already carry the overhead map-light wiring; base cars are feasible too but need extra power taps because that wiring is absent. Plan to fabricate a small wiring harness, transfer connector pins, tap three vehicle circuits, and remove interior trim, so a soldering iron and basic automotive electrical skills are needed. Because donor consoles differ in color, mounting-hole spacing, and whether they carry the auto-off Door switch, selecting the correct unit matters as much as the wiring. Adapted from a community writeup by Zalthras on FitFreak (https://www.fitfreak.net/forums/2nd-generation-ge8-specific-fit-i-c-e-sub-forum/57699-diy-complete-tsx-homelink-install-ge8-sport-w-nav.html), including corrections from the follow-up discussion.
Honda Civic (Mk8) Gear Knob and Shift Gaiter Replacement
A worn or cracked factory gear knob and a scuffed shift surround let down an otherwise smart interior, and the plastic original fitted to many eighth-generation Civics (FK/FN, 2006-2011, including Type S and Type R models) feels cheap in the hand. This guide covers swapping both the knob and the shift gaiter (boot) for better-quality items, giving a noticeable lift in look and feel for very little money. Popular choices pair a leather, suede or genuine Alcantara Audi TT gaiter, which matches the Civic's cloth, leather or Alcantara trim in several stitching colours, with a Nissan 350Z leather knob, a genuine Honda Type R ball, or an aftermarket Richbrook or Skunk2 knob. The task needs no special tools and is normally finished in well under half an hour, making it a sound first modification. Note that the display trim shown in many eBay gaiter photos is not supplied; only the fabric boot ships. Adapted from a community writeup by Yannis on Civinfo (https://www.civinfo.com/threads/another-gear-knob-and-gaiter-how-to.64809/), including corrections from the follow-up discussion.
Honda Civic Type R (FN2) In-Tank Fuel Filter and Pump Replacement
This guide covers replacing the in-tank fuel filter on the FN2 Honda Civic Type R (2007-2011), a job that also renews the fuel pump because both share a single assembly inside the tank. The same procedure applies to the 1.8-litre petrol versions of the eighth-generation Civic; it does not apply to the 2.2 diesel, whose fuel system differs. On these cars the filter is not an inline canister but part of a combined pump, strainer and pressure-regulator unit sitting in the top of the tank, reached through an access hatch under the center console rather than from beneath the car. Owners take it on to meet the service schedule (commonly quoted around 75,000 miles / 80,000 km), to cure cold-start hesitation from a clogged element, or simply to avoid a large dealer bill for what is a couple of hours of careful home work. The main challenges are managing fuel spillage inside the cabin and refitting the tank seal and retaining ring, both of which the follow-up discussion helped refine. Adapted from a community writeup by stiggy on Civinfo (https://www.civinfo.com/threads/civic-type-r-fn2-fuel-filter-pump-replacement.65946/), including corrections from the follow-up discussion.
Honda Fit (GK) Interior and License Plate LED Bulb Conversion
The 2015-and-later Honda Fit (third-generation GK chassis) ships with incandescent bulbs in its cabin and license plate lamps, which draw more current and cast a dim yellow glow. Swapping them for wedge-base LEDs gives a whiter, slightly brighter light, cuts the drain that can flatten a battery if a door is left ajar, and takes only a few minutes with no wiring. Every fixture on the car covered here uses the same T10 / 194 wedge bulb, so a single multi-pack handles the front map lights, the dome light, the cargo lamp, the license plate lamps, and the front side markers. Because these LEDs are polarized, a bulb that stays dark simply needs to be turned around in its socket. This guide applies to the GK-generation Fit and to related Honda models that share the same snap-in lens fixtures. Adapted from a community writeup by ADVphotography on FitFreak (https://www.fitfreak.net/forums/fit-interior-exterior-illumination/83738-how-guide-upgrade-interior-bulbs-led.html), including corrections from the follow-up discussion.
Honda Fit (GK) Aftermarket Steering Wheel Install with a Spoon / WorksBell 226 Hub
This guide covers replacing the factory steering wheel on a third-generation Honda Fit (GK / GK5) with an aftermarket wheel such as a Nardi, Momo, Sparco, or Grip Royal, mounted on a Spoon GK5 hub. That hub is the very same part Honda-scene vendors also sell under the WorksBell 226 and 226S labels. Because the Fit runs an airbag and electric power steering, this is as much an electrical job as a mechanical one: the SRS system has to be discharged and then faked out with resistors, and the steering-wheel-control connector must be handled or the EPS warning light will appear. Done carefully, the airbag reseats to factory fitment and the swap is clean; done carelessly, by hammering the old wheel on or off, you can wreck the steering angle sensor behind the horn and trigger random EPS faults. Read the full procedure, including the resistor and sensor notes gathered from members who ran into trouble, before you start. Be aware that removing the airbag deletes a life-safety device and may need to be reported to your insurer. Adapted from a community writeup by nisco on FitFreak (https://www.fitfreak.net/forums/3rd-gen-gk-specific-fit-interior-modifications-sub-forum/96339-diy-aftermarket-steering-wheel-install-using-spoon-worksbell-226-hub.html), including corrections from the follow-up discussion.
Honda Fit (GK) ACUITY Shift Boot Collar Installation
Fitting a heavier aftermarket shift knob to a 2015-and-newer third-generation Honda Fit (GK) usually leaves the shift boot drooping, because the factory silver plastic snap ring is designed to hold the boot taut only against the light OEM knob. The ACUITY Instruments boot collar replaces that plastic ring with a metal collar that keeps the boot standing upright regardless of knob weight. The collar is reversible, so either face can be shown to suit different knob styles, and it comes in stainless steel or anodized black aluminium. This guide covers the full installation on a GK Fit, which requires removing the center console to reach and invert the boot; there is no shortcut that avoids pulling the console. The trim breakdown described matches an LX interior, so EX and Sport trims will differ slightly around the accessory panel. None of the work is mechanically risky, but it does involve unplugging several harness connectors, so budget time for careful trim removal. Adapted from a community writeup by nisco on FitFreak (https://www.fitfreak.net/forums/3rd-gen-gk-specific-fit-interior-modifications-sub-forum/97760-diy-acuity-instruments-shift-boot-collar-upgrade-installation.html), including corrections from the follow-up discussion.
Honda Civic (9G) Front Door Card Removal
This guide covers taking the front interior door panel (door card) off a ninth-generation Honda Civic so you can reach the window regulator, wiring, switch packs, speaker, or the handle mechanism behind it. The panel is held by a mix of hidden screws and push clips, plus two electrical connectors for the window and mirror switches, so the job is mostly about releasing everything in the right order without cracking clips or scarring the trim. The layout shown here is from European and Italian-market cars but is common across the 9G range. Earlier eighth-generation Civics use a similar approach, with the main difference being that on the 9G you can unplug the switch connectors before the card is fully unclipped. Work slowly and protect the plastics, because pry marks on the visible faces are hard to hide. Adapted from a community writeup by ante00 on Civinfo (https://www.civinfo.com/threads/how-to-remove-door-card.341969/), including corrections from the follow-up discussion.
Painting Honda Brake Calipers with High-Temperature Paint
Painting the brake calipers is a low-cost cosmetic upgrade that hides surface rust and sharpens the look of an exposed wheel, which matters most once aftermarket rims put the hardware on display. This guide covers refinishing the front disc calipers on a Honda Civic and similar Honda models that run front discs, using a heat-rated paint, and it works whether you leave the caliper bolted in place or free it from its bracket for fuller coverage. The job needs only basic hand tools and abrasives and can be finished in an afternoon. Because the caliper lives in a hot, wet, salt-exposed environment, thorough rust removal and a temperature-rated coating are what separate a finish that lasts from one that flakes within a season. Adapted from a community writeup by deevin9 on Honda-Tech (https://honda-tech.com/forums/paint-body-84/%2A%2Adiy-brake-calipers%2A%2A-%5Bpics-56k-gtfo-%5D-1981261/), including corrections from the follow-up discussion.
Acura RSX (DC5): Wiring an OEM Fog Light Switch to a Replica Fog Harness
Aftermarket and eBay fog light kits for the Acura RSX (DC5, roughly 2002-2006) ship with a cheap replica switch that often refuses to hold an off state or lacks proper backlighting. Replacing it with the genuine Acura fog switch gives a factory look and reliable operation, but the OEM switch carries five terminals while a typical replica harness offers only four, so the two must be reconciled by hand. This guide covers identifying both pinouts, joining the switch to the harness function-by-function, handling the extra ground pin, and curing the common fault where the red backlight stays lit whenever the car is running. Basic soldering and an understanding of how a simple switched circuit works are all that is required. Adapted from a community writeup by KazeSpec on Club RSX (https://www.clubrsx.com/threads/diy-oem-fog-switch-to-replica-harness.469745/), including corrections from the follow-up discussion.
Fitting a Fujita Cold Air Intake to an Automatic Honda Fit (Not Recommended)
This guide covers mounting the Fujita CA-1924 cold air intake on a first-generation Honda Fit Sport (GD) equipped with an automatic transmission. The catch is that this kit is engineered for the manual-transmission Fit: on an automatic the transmission cooler line bracket sits in the intake's path, so the tube must be forced around it and the front bumper structure has to be trimmed for clearance. The result works and gives a noticeable induction gain, but it is a fight to install and the finished tube tends to sit close to the transaxle and the radiator cap. Read the whole procedure and the cautions before starting, because owners who followed it reported a scratched tube and a radiator cap that rubbed loose and let coolant escape. If your car is an automatic and you have not yet bought a kit, the purpose-built Injen SP1511 fits an automatic Fit without cutting or fabrication and is the better choice. Attempting this may void your factory warranty. Adapted from a community writeup by gettinafit on FitFreak (https://www.fitfreak.net/forums/fit-diy-repair-maintenance/5990-install-fujita-m-t-cai-t-not-recommended.html), including corrections from the follow-up discussion.
Acura RSX (DC5) DIY Engine Grounding Wire Kit Installation
Additional engine-bay ground wires are a long-running, low-cost tuning mod on the Acura RSX and its Honda Integra (DC5) counterpart. The idea, borrowed from Japanese aftermarket kits such as the HKS Circle Earth, Spoon Earth Code, and XS-Engineering Hyper Ground systems, is to supplement the factory grounds with heavier, cleaner return paths between the battery and various engine and chassis points. In practice the dyno gains are marginal, often within measurement noise and rarely more than about one horsepower, but many owners consistently report a smoother idle and slightly sharper throttle response, and a home-built kit costs only around $24-30 in wire and terminals versus $100 or more for a branded set. This guide covers both the elaborate multi-point layout and the far simpler two-cable approach that later testing in the thread suggests works just as well, so you can pick the level of effort that suits you. It applies to 2002-2006 RSX and RSX Type-S models. Adapted from a community writeup by Jay_ on Club RSX (https://www.clubrsx.com/threads/diy-ground-wire-installation-guide.169677/), including corrections from the follow-up discussion.
Smoked Taillights with VHT Night Shades Aerosol Tint (Acura RSX)
This guide covers darkening (smoking) the rear taillight lenses of an Acura RSX using VHT Night Shades, a translucent aerosol tint that sprays directly onto the outside of the lens. Because the coating is translucent, the amber, red, and white bulb colors still project through it when the lights are on, so the housings keep functioning while gaining a tinted look. It is an inexpensive alternative to buying pre-smoked or European lenses, and it is forgiving: a mistake can be wiped back off with paint thinner before it fully cures. Darkness is controlled entirely by how many light coats you apply, so the same product produces anything from a barely-there tint to a deep blackout. The method is popular on the DC5 RSX but transfers to most Honda and Acura lenses; a can typically runs about 15-20 USD (roughly 20 CAD) and is sold mostly online. Removing the housings first gives more even coverage and far less masking than tinting on the car. Adapted from a community writeup by ScOoTLy on Club RSX (https://www.clubrsx.com/threads/diy-smoked-taillights.283982/), including corrections from the follow-up discussion.
Acura TL (1G) Inline Fuel Filter Replacement
This guide covers replacing the inline fuel filter on the first-generation Acura TL, documented on a 1997 2.5 and expected to be closely similar on the 3.2 and adjacent model years. A clogged or aging fuel filter can make the engine feel hesitant and cause the idle to hunt when you lift off the throttle; a fresh filter restores smoother throttle response and helps protect the injectors from debris. The work itself is simple - three fuel connections and one small retaining bracket - and most people finish in well under an hour, but a single detail dominates the whole job: the lower fuel line nut is notoriously tight and has to be handled carefully so the steel line is not damaged. This writeup folds in the fixes and hard-won lessons from the thread's replies, especially the correct sequence for breaking that nut loose and the right wrenches to use. Adapted from a community writeup by UnsanePyro on AcuraZine (https://acurazine.com/forums/1g-tl-problems-fixes-118/how-replace-fuel-filter-572966/), including corrections from the follow-up discussion.
Acura RDX (2G) Front Door Panel Removal
This guide covers taking the front door panel off a second-generation Acura RDX (2013-2018) to reach the hardware behind it. Removing the panel is the starting point for replacing a side mirror, upgrading or servicing the door speakers, adding sound deadening, or working on the window and lock mechanisms. The door cavity is backed by a thin fiber mat, which is easy to peel back once the trim is off. The job relies mostly on releasing hidden screws and push clips, so the main risk is cracking a clip or snapping one of the small locating tabs; proper plastic trim tools and unhurried prying prevent that. Adapted from a community writeup by Dimcorner on AcuraZine (https://acurazine.com/forums/2g-rdx-diy-faq-406/diy-taking-door-panel-off-948968/), including corrections from the follow-up discussion.
Convert DVD-Audio Discs to 5.1 FLAC for the Acura RDX ELS Studio 3D
This guide walks through turning DVD-Audio (DVD-A) discs into 5.1 surround FLAC files that a 2019 or 2020 Acura RDX can play from a USB flash drive through its ELS Studio 3D audio system. Many owners still hold surround discs bought for older Acuras whose head units had optical drives; because the current RDX replaces the disc slot with USB and Bluetooth, that multichannel content has to be ripped off the disc and re-encoded into a form the head unit accepts. The single most important requirement is that the finished files be 24-bit, 48 kHz FLAC with zero compression, since anything running at 96 kHz or carrying compression is refused by the player. The process uses free Windows software: one tool extracts the surround tracks from the disc as WAV, and a second re-encodes them to tagged FLAC. Be aware that only the 2019/2020 RDX with ELS Studio 3D supports this route; earlier disc-based ELS head units, such as the one in the 2017 TLX, will not play USB 5.1 FLAC. Adapted from a community writeup by oblio98 on AcuraZine (https://acurazine.com/forums/3g-rdx-audio-bluetooth-electronics-navigation-455/dvd-5-1-flac-step-step-971819/), including corrections from the follow-up discussion.
Acura Integra Cold Air Intake Installation (AEM-Style CAI)
This guide covers installing an AEM-style cold air intake (CAI) that relocates the filter down into the fender well, replacing the restrictive factory airbox and resonator. It was performed on a 2001 Integra Type R and applies unchanged to the third-generation RS, LS, GS, and SE. GS-R owners can follow the same steps; their intake pipe simply carries an extra bend near the throttle body. Second-generation Integra owners can also use it, with a pipe that lacks one of those bends. A CAI is one of the highest-value bolt-on modifications for the money, freeing up intake airflow and letting the engine breathe and sound the way it should. The procedure here deliberately uses minimal equipment so it can be done in a driveway. Adapted from a community writeup by SurferX on Team Integra (https://www.team-integra.net/threads/aem-style-cold-air-intake-install.342474/), including corrections from the follow-up discussion.
Honda Fit (GD): Wiring Footwell / Accent Lights to the Dome-Light Circuit
This guide covers adding accent or footwell lighting to the first-generation Honda Fit (GD) so the lights follow the dome-light circuit: they come on when a door opens or the car is unlocked with the remote, and switch off when the dome light does. The approach taps two contacts in a connector near the driver's-side fuse box - a constant 12V power source and the ground that the dome-light system switches - and feeds them to cold-cathode tubes or 12V LED strips of your choice. It also covers an optional toggle-switch variation that runs the lights from an accessory circuit for on-demand control without draining the battery. The wiring itself is straightforward, but the work happens in the tight space under the dash and calls for a multimeter to confirm each contact before you commit. Adapted from a community writeup by jl0r on FitFreak (https://www.fitfreak.net/forums/fit-interior-exterior-illumination/10803-diy-guide-wiring-lights-along-w-dome-light.html), including corrections from the follow-up discussion.
Honda Fit Footwell, Ambient, and Glovebox LED Lighting Installation
This guide covers adding custom interior accent lighting to a second-generation Honda Fit (GE8 chassis, roughly 2009-2013; the same wiring logic adapts to the earlier GD chassis). You will build three independently triggered lighting zones: footwell courtesy lights that track the factory dome-light behaviour (fading in and out with keyfob lock/unlock and door open/close), ambient accent lights and glovebox lights driven by the parking/headlight switch, plus optional cup-holder and under-seat rear lighting. Rather than mounting a kit's supplied modules where they sit in plain view, the approach hides dimmed flux LEDs inside recessed trim so only the glow shows, and it swaps the kit's teal-tinted emitters for cleaner cool-white and blue LEDs. A repurposed dash switch, gated by a diode, lets the driver light just the footwells without waking the dome light. Total LED cost is modest (about $20-25 in LEDs plus the ambient kit). Expect to remove several interior panels and tap the under-dash fuse box, so plan for a patient afternoon of wiring. Adapted from a community writeup by Zalthras on FitFreak (https://www.fitfreak.net/forums/fit-interior-exterior-illumination/45011-diy-footwell-illumination-ambient-lights-glovebox-illumination.html), including corrections from the follow-up discussion.
Honda Fit (GE8) LED Taillight and Rear Fog Light Retrofit
This guide covers retrofitting JDM-style LED taillights and a working left-side rear fog light to a USDM/NA Honda Fit Sport (GE8, roughly 2009-2013). Several markets, including Taiwan, the UK, Germany, and China, sell the Fit/Jazz with LED tails that carry a left-hand-drive rear fog lamp: a single red light of brakelight-level intensity (about 21/23W) intended to make a vehicle visible in heavy fog, torrential rain, or a snow white-out. Because the USDM Sport already routes its combination-switch fog dial to the front fogs, the factory Base-model foglight switch, harness, and relay can be repurposed to drive the rear fog through the car's existing fuse/relay module. The job pairs a plug-and-play taillight swap with a modest amount of interior trim removal, a single wire run from the rear to the fuse box, one signal tap, and light soldering. Sourcing the correct OEM parts is the main hurdle. Adapted from a community writeup by Zalthras on FitFreak (https://www.fitfreak.net/forums/fit-interior-exterior-illumination/50088-diy-led-tails-w-rear-foglight-ge8-sport.html), including corrections from the follow-up discussion.
Honda Fit (GD) Cupholder LED Illumination Upgrade
The first-generation Honda Fit places a pair of clear lenses beneath the climate controls so that a small amount of dashboard backlight reaches the cupholders, but US-market cars have no dedicated bulb there and the glow is barely perceptible after dark. This guide covers replacing that weak light bleed with one or two bright LEDs mounted directly behind those lenses, so the cupholder pocket is clearly lit whenever the running lights are switched on. It applies to the GD-chassis Fit (roughly the 2007-2008 US cars) and taps the existing climate-control lighting feed, so no factory wire needs to be permanently cut. The build can use a ready-made LED holder kit or a home-soldered LED-and-resistor assembly; either way the vehicle-side steps are the same. Adapted from a community writeup by koolkevin1107 on FitFreak (https://www.fitfreak.net/forums/fit-interior-exterior-illumination/7930-interior-light-kit-diy.html), including corrections from the follow-up discussion.
Honda Fit (GD) Rear Koni Sport Shock Conversion
The first-generation Honda Fit (GD) left the factory with no aftermarket performance option for the rear dampers, so owners adapted a Koni unit built for a different car. This guide covers installing the Koni Sport "Yellow" model 8041-1191 rear damper, originally listed for the 1994-1998 Saab 900 NG, into the rear of a GD-chassis Fit. The Koni reuses the factory mounting locations with two adaptations: the upper hardware must be resized to the Koni's larger shaft and top diameter, and the narrower lower eye must be shimmed to remove side play. The payoff is a firm, single-adjustable rear damper where nothing off-the-shelf existed. It suits street cars at or near stock ride height; read the warnings before fitting it to a lowered car. Adapted from a community writeup by mike410 on FitFreak (https://www.fitfreak.net/forums/fit-suspension-brake-modifications/73823-diy-koni-yellows-gd3-rear.html), including corrections from the follow-up discussion.
DIY Flex-Fuel Ethanol Content Analyzer for OBD1 Honda ECUs
A factory flex-fuel (ethanol content) sensor from a GM vehicle reports ethanol percentage as a digital PWM signal that swings between 50 and 150 Hz, with fuel temperature carried in the pulse's duty cycle. Most Honda engine management setups, however, cannot read that digital signal directly. Chipped OBD1 ECUs and popular tuning platforms such as Hondata, Neptune, and Honda's tuning suite instead expect a simple 0-5V analog input to interpret ethanol content. Purpose-built commercial converters cost roughly $200. This guide builds an inexpensive alternative for about $20-100 using a junkyard GM sensor and a small Arduino-class microcontroller. The controller decodes the sensor's frequency into an ethanol figure (and its duty cycle into fuel temperature), then re-emits a smoothed 0-5V voltage the ECU can act on, enabling flex-fuel operation on E85 or blended pump gas without constant retuning. It suits boosted or E85 Honda and Acura builds running OBD1 engine management with a chip, Hondata, or Neptune. Adapted from a community writeup by forbiddenera on Honda-Tech (https://honda-tech.com/forums/forced-induction-16/diy-flex-fuel-sensor-ethanol-content-anaylzer-%7E%2420-100-dont-need-zeitronix-3348257/), including corrections from the follow-up discussion.
Devcon Block Fill: Reinforcing a Honda B-Series Open-Deck Block for Boost
This procedure reinforces the thin, cast-in sleeves of an open-deck Honda or Acura aluminum block so they can survive high boost, using Devcon Liquid Aluminum F-2 epoxy poured into the water jacket. It is a low-cost alternative to a steel block guard or a full resleeve: rather than pressing a thin metal ring against the sleeves, which can shift or distort them, the epoxy bonds to the outer jacket and forms a thick, rigid collar of metal-filled material around the lower portion of each cylinder, resisting the sleeve flex that cracks stock blocks under detonation. It applies to B-series blocks (B16A, B18/LS, B20) and D-series blocks, and the same method scales to F- and H-series castings. Contributors in the thread report stock-bore B-series builds surviving in the 400-plus whp range at over 30 psi with this treatment, while the original author targeted roughly 400 whp at 20-25 psi. It is a budget, experimental modification, not a factory-sanctioned repair, and it trades some cooling capacity for strength, so fill thickness and thorough flushing matter. Adapted from a community writeup by ccfab on Honda-Tech (https://honda-tech.com/forums/welding-fabrication-53/diy-filled-b-series-block-writeup-comments-welcome-1444721/), including corrections from the follow-up discussion.
Blueprinting a Honda Four-Cylinder Bottom End: Precision Measurement for a Race Build
This guide covers precision blueprinting of a Honda four-cylinder bottom end, the measurement-driven approach used for a serious street or race build rather than a basic rebuild that relies only on plastigauge, a torque wrench, and feeler gauges. The methods apply to the B, D, F, and H series (and, by extension, the K series, whose bearing thicknesses are believed to match), and cover the same fundamentals whether the block sits in a Civic, Integra, Prelude, or Accord. The goal is to independently verify every clearance and geometry figure that a machine shop or a previous builder handed you, because a single wrong clearance, a taper you never measured, or a fastener that was not properly secured can destroy a fresh motor. You will measure pistons, bores, crank journals, and main bores; select bearings from the Honda color chart; check crank straightness and main-bore alignment; correct every figure for thermal expansion; and confirm the result before it runs. Treat the machine shop's work as something to be checked, not trusted on faith. Adapted from a community writeup by 98vtec on Honda-Tech (https://honda-tech.com/forums/engine-machining-assembly-164/diy-engine-block-blueprinting-techniques-3138527/), including corrections from the follow-up discussion.
Acura CL (1G) Low-Beam HID Conversion
This guide covers installing an aftermarket 9006 HID conversion kit into the low-beam reflector housings of a first-generation Acura CL, replacing the stock halogen low beams with brighter xenon output. It walks through freeing up engine-bay space by removing the battery and trays, seating the HID capsules, mounting the ballasts and relay, and wiring power directly from the battery. Color temperatures commonly run from about 4300K (closest to a factory white look) up to 6000K (cooler and bluer). Note that these kits drop into the car's existing reflector housings and are not a projector retrofit, so the beam will not have the sharp cutoff a projector produces. Many modern kits are fully plug-and-play and skip the soldering described here. Adapted from a community writeup by Mulk on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/hid-conversion-470941/), including corrections from the follow-up discussion.
Acura CL Brake Rotor and Pad Replacement with Caliper Painting
This guide covers replacing the front rotors and pads on a first-generation Acura CL and, while the brake is apart, refinishing the caliper and mounting bracket with high-temperature paint for a cleaner look. The mechanical steps apply to the 2.2 and 2.3 four-cylinder cars; the original author confirmed the work was done on a 2.3 and could not verify the 3.0 V6, which uses a larger brake and may differ in fastener sizes, so treat V6 torque figures as unconfirmed. The job is worth doing when rotors are warped or scored and pads are worn, and painting the hardware is an optional cosmetic upgrade that costs little beyond time. Expect the bracket bolts to be tight and often corroded, so plan for penetrating oil and a breaker bar. Adapted from a community writeup by NuMnUtZzZ on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/brake-rotor-pad-caliper-paint-diy-guide-471714/), including corrections from the follow-up discussion.
JDP Front Lip Installation on the 2012+ Honda Fit (GE8)
This guide covers fitting the JDP Engineering front lip to the 2012-and-later second-generation Honda Fit (GE8). The lip mounts to the lower edge of the factory front bumper and gives the car a lower, more aggressive look without changing ride height. Because the holes pre-drilled into the lip do not line up with the bumper's factory clip points, the job requires drilling fresh mounting holes directly into the OEM bumper, making it a permanent, non-reversible modification best suited to owners comfortable with that trade-off. The kit ships with its own bolts, washers, and nuts that take the place of the stock deflector clips. Budget time for full bumper removal, patient test-fitting, and hardware mounting, and check side-to-side alignment carefully before committing to any drilling. Adapted from a community writeup by jdmj0 on FitFreak (https://www.fitfreak.net/forums/2nd-gen-ge8-specific-fit-exterior-modifications-jdm-styling-sub-forum/74742-diy-2012-jdp-honda-fit-front-lip.html), including corrections from the follow-up discussion.
DIY Front Lip for the Honda Fit Using Garage-Door Weather Seal
This budget mod adds an aggressive-looking chin lip to the front of a second-generation Honda Fit (GE8, roughly 2009-2013) using a length of rubber garage-door bottom seal instead of a molded plastic spoiler. The flexible weather stripping bolts and tapes to the lower edge of the front bumper, dropping the visual ride height and mimicking an OEM sport lip while costing only about $15-25 in total. Because the rubber is soft and resilient, it shrugs off the curb strikes and driveway scrapes that would crack a hard plastic lip, and it can be replaced cheaply if a rough winter finally destroys it. The technique works on base and sport trims alike, and members report success on other Honda platforms as well. Longevity depends heavily on climate: it holds up well through rain and summer heat but takes a beating from snow, salt, and ice. Adapted from a community writeup by sandblasted on FitFreak (https://www.fitfreak.net/forums/2nd-generation-ge8-specific-diy-repair-maintenance-sub-forum/59704-diy-front-lip.html), including corrections from the follow-up discussion.
How to Paint Alloy Wheels at Home (Acura CL)
This guide covers refinishing a set of alloy wheels with spray primer and paint at home, a low-cost way to change your wheel color or hide previous-owner damage for roughly the price of a couple of aerosol cans. It was written around a 1st-generation Acura CL five-spoke set, but the process applies to essentially any painted or clear-coated aluminum alloy wheel. Done carefully, the result holds up well and can always be re-sprayed later if it wears. Expect to spend two to three hours on a simple wheel design, and considerably longer on intricate multi-spoke wheels where prep is the slow part. Adapted from a community writeup by Anhedonia on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/diy-painting-wheels-715924/), including corrections from the follow-up discussion.
Adding a Subwoofer and Amplifier to a Honda Civic With the Factory Head Unit
This guide covers adding a subwoofer and amplifier to a Honda Civic while keeping the factory head unit. Because the stock stereo has no RCA pre-outs, the amplifier signal is taken from the rear speaker wiring through a line output converter (LOC), which reduces speaker-level output to the line level an amplifier expects. The approach suits owners who want stronger bass without swapping the standard radio, and the wiring path shown applies across the eighth-generation Civic hatch (FN2 and related FK models) with the OEM head unit. The work breaks down into four wiring runs: a fused power feed brought from the battery into the cabin, a low-level signal tapped from the rear speakers, a switched remote turn-on lead, and a solid amplifier ground in the boot. Read the impedance warning below before deciding exactly where to take the signal from. Adapted from a community writeup by Deemon on Civinfo (https://www.civinfo.com/threads/how-to-install-a-subwoofer-and-amp.399/), including corrections from the follow-up discussion.
Honda Fit (GE8) Hatch LED Cargo Lighting Install
The Honda Fit's factory cargo-area lighting is weak, leaving the tailgate area poorly lit after dark. This guide adds bright aftermarket LEDs to the hatch of the second-generation Fit (GE8, sold as the Jazz in some markets), giving clear illumination when loading the boot at night. It covers mounting prewired white LEDs into the tail light access covers, routing power through the body to both sides, tapping the existing hatch-light circuit for switched power, and an optional second LED set into the hatch door itself. A simpler variation shared by another member wires a parallel circuit so the original bulb stays lit alongside an added LED strip. Basic soldering, drilling, and wire-routing ability is needed. Adapted from a community writeup by chubbykai on FitFreak (https://www.fitfreak.net/forums/2nd-generation-ge8-specific-diy-repair-maintenance-sub-forum/47599-diy-install-hatch-leds.html), including corrections from the follow-up discussion.
Honda Civic Aftermarket Rear Parking Sensor Installation
Factory reverse parking sensors are expensive, and paying a dealer to fit them adds even more. A generic four-sensor reversing kit costs a fraction of the price and does the same job, which makes it an appealing weekend project for the UK Honda Civic. This guide covers the complete installation: colour-matching and preparing the sensors, removing the rear bumper without breaking trim, drilling and mounting the four sensors, sealing the cable entry against water, splicing the supply into the reverse-light circuit, and locating the control box and buzzer inside the boot. It applies to the 8th-generation Civic hatchback and adapts easily to similar models; the sensor hardware itself is universal rather than vehicle-specific. The main skills required are careful trim removal and one irreversible step: drilling the painted bumper. Adapted from a community writeup by Miggins on Civinfo (https://www.civinfo.com/threads/how-to-install-non-oem-parking-sensors-and-save-250.1202/), including corrections from the follow-up discussion.
Building a DIY Equal-Length Tubular Turbo Manifold for Honda D-Series
This guide covers fabricating an equal-length, tubular 4-into-1 turbo exhaust manifold for a Honda D-series engine from off-the-shelf stainless elbows and a shop-built merge collector, rather than buying a finished unit. The original build was based on a D16Z6 in an EG Civic hatch running a small T25-class turbo, and the same construction method adapts to B-series and H22A swaps with packaging changes (for example, lowering the manifold and clearing the alternator on an H22). A home-fabricated manifold of this style has been used to support well over 200 wheel horsepower, so the payoff is a strong, custom part at a fraction of the cost of a name-brand piece. It is an advanced project: it demands stainless welding skill (or a trusted welder), careful mock-up, and a jig to cut a merge collector accurately. Adapted from a community writeup by Terrabomb on Honda-Tech (https://honda-tech.com/forums/welding-fabrication-53/diy-constructing-sorta-equal-length-tubular-replica-manifold-materials-list-956666/), including corrections from the follow-up discussion.
Honda Civic (8th Gen) Footwell LED Lighting Wired to the Courtesy-Light Circuit
Aftermarket footwell LED strips give an 8th-generation Honda Civic the same soft glow as the factory ambient lighting option. This guide wires the strips into the interior courtesy-light feed so they behave like Honda's own lamps: full brightness the moment you unlock the car or open a door, then a gentle fade to off when you lock up or start the engine, staying dark while you drive. It applies to the UK and European 8th-generation Civic (1.8 i-VTEC Sport, Type S, and 2.2 i-CTDi diesel), all of which carry the same two switched wires behind the lower dash even though the connector block's colour and shape differ between models. The electrics themselves are simple, since you tap only two wires, but the job earns its difficulty from the cramped, low location of the connector, where the wires are short and break easily. Kits such as RickHondaR's replica strips arrive with their leads already soldered and scotch locks supplied, though generic strips work just as well. Adapted from a community writeup by soponcio_virtual on Civinfo (https://www.civinfo.com/threads/how-to-diy-footwell-lights-they-dim.18907/), including corrections from the follow-up discussion.
Fitting a Number-Plate Reversing Camera to a 3-Door Honda Civic Type R (FN2)
This guide covers installing a number-plate-mounted reversing camera on a three-door 2007 Honda Civic Type R (FN2) and wiring it into the factory satellite-navigation screen so the rear view appears automatically when reversing. Most published writeups are aimed at the four- and five-door bodyshells; the three-door hatch routes the camera lead differently because of the panel layout around the tailgate and rear speakers, so the rear section of the run needs its own approach. The job avoids stripping the dashboard entirely - the head-unit connection is made by feel through a single footwell panel, and the cable is fished through the interior trim with a coat hanger rather than pulling the cabin apart. The result is a factory-integrated reversing view that gives far better parking accuracy than sensors alone, at a fraction of the cost of the Honda OEM system. Adapted from a community writeup by mel2401 on Civinfo (https://www.civinfo.com/threads/how-to-fit-a-number-plate-mounted-reversing-camera.54097/), including corrections from the follow-up discussion.
Honda Fit (3rd Gen GK) Footwell LED Lighting Tied to the Dome Light Circuit
This guide covers adding footwell lighting to a third-generation Honda Fit (GK) that switches on with the interior dome/courtesy circuit. The strips illuminate the front and rear floor areas when a door opens or the doors are unlocked by remote, then go out when the dome light does, so they are not always-on ambient lighting. Beyond the visual effect, the extra floor light makes it far easier to spot dropped items in the dark when entering or leaving the car. The build taps the factory dome-light signal at the driver's-side fuse panel, so no permanent cutting of vehicle harnesses is required and the install can be fully reversed. It suits owners comfortable with basic soldering and careful low-voltage wiring. This guide also folds in the follow-up discussion, most importantly the correction that the inline fuse belongs on the positive lead of a negative-ground vehicle, and the more secure fuse-tap connection method. Adapted from a community writeup by tbFit on FitFreak (https://www.fitfreak.net/forums/3rd-gen-gk-specific-fit-interior-modifications-sub-forum/87882-diy-footwell-lighting-w-dome-not-ambient.html), including corrections from the follow-up discussion.
Honda Civic 2.2 i-CTDi Diesel EGR Valve Removal and Cleaning
A clogged exhaust gas recirculation (EGR) valve is one of the most common causes of poor low-rev performance on the 2.2-litre i-CTDi diesel Honda Civic (FK generation) and the related 2.2 diesel CR-V. Recirculated exhaust gas gradually lays down a tar-like sludge across the valve and the intake manifold ports, choking airflow. Owners typically notice hesitation or rough running in the higher gears at around 1500 rpm long before any fault code appears, and blockages of 60 to 90 percent are routinely found between roughly 65,000 and 110,000 miles. Removing, cleaning, and resealing the valve restores throttle response and often improves fuel economy for little more than the price of a gasket kit. This guide covers the diesel engine; the petrol R18A2 uses a different valve and gasket set, so confirm the correct parts for your engine first. Note that a remap on its own will not clear these deposits, so clean the intake before considering one. Adapted from a community writeup by immelman on Civinfo (https://www.civinfo.com/threads/how-to-clean-remove-fk3-2-2-diesel-egr-valve.72471/), including corrections from the follow-up discussion.
Honda Civic EP3 Headliner Removal and Suede Re-Wrap
This guide covers pulling the headliner from a Honda Civic EP3 (2002-2005 Si hatchback and Type R) and re-covering it, together with the sunroof sunshade, in stretch suede for a custom roof finish. The underlying technique began as an Acura RSX (DC5) writeup, but the EP3 diverges in two important places: its seatbelt pillars cannot be released without stripping a large amount of extra trim, so the liner has to be flexed out of the car with a helper, and the sunroof glass and sunshade are held by different fasteners than the RSX. Doing the job yourself lets you refresh a stained or faded factory liner, or match the roof to an interior colour scheme, without paying for a professional retrim. Work in a well-ventilated space and line up a second pair of hands before starting. Adapted from a community writeup by Martian SI on Club RSX (https://www.clubrsx.com/threads/diy-ep3-headliner-removal-and-wrap.719472/), including corrections from the follow-up discussion.
Honda Fit (GD) DIY Rear Camber Shim Mod
This guide covers a low-cost way to add negative rear camber to the first-generation Honda Fit (GD chassis, sold as the Jazz in some markets). Owners who lower these cars often end up with the rear wheels sitting too upright for an aggressive wheel fitment, and the drop also pushes rear toe out of specification. By slipping thin tapered shim washers behind each rear hub where it bolts to the trailing-arm assembly, you tilt the hub inward, gaining several degrees of negative camber while partially offsetting the toe change. Builders in the source thread reported anywhere from a mild setting that just clears fender rub up to roughly -5 to -6 degrees. Treat this as a stance and fitment modification rather than a precision alignment fix: it relies on hardware-store washers instead of full-contact machined shims, and several experienced members caution against it for track or autocross use, where a machined full-contact shim or an OEM replacement hub is safer. It is documented on the GD Fit; the later GE chassis reportedly will not allow it because of how its rear hub is built. Plan to have the rear wheels professionally aligned afterward. Adapted from a community writeup by nxtfit_08 on FitFreak (https://www.fitfreak.net/forums/fit-diy-repair-maintenance/64996-diy-rear-camber-mod-gd.html), including corrections from the follow-up discussion.
Retrofitting OEM HID Projectors into Honda and Acura Headlights
This guide covers transplanting a factory xenon (HID) projector into a Honda or Acura headlight that originally used a halogen bulb, producing a sharp, glare-controlled beam that a plug-and-play HID kit cannot match. A true retrofit reuses an OEM projector engineered around the D2S arc rather than forcing xenon bulbs into a halogen optic, which is why the result is bright and clean instead of scattered. The technique has been applied to Integra (DA and DC2), Civic (EG and EK), Accord, RSX, and Prelude housings using donor projectors from the S2000, Acura TSX, and a range of European cars. Expect real fabrication: opening and resealing the housing, cutting the reflector, building a bracket, shielding stray light, and wiring a proper relay harness. Because the work involves high-voltage ignitors and aim that affects other drivers, it is best suited to someone comfortable with wiring and hand fabrication. Adapted from a community writeup by PatrickGSR94 on Honda-Tech (https://honda-tech.com/forums/lighting-107/hid-retrofit-club-1108424/), including corrections from the follow-up discussion.
Acura RSX (DC5): Integrate a Garage Door Opener into a Blank Dash Switch
This project relocates a bulky garage door remote out of the cabin and replaces its handheld button with a discreet push-button flush-mounted in an unused dash switch position. It suits an Acura RSX (DC5) that lacks factory fog lights, which leaves an empty filler switch on the left of the dash that is ideal for the button; the remote itself is then hidden under the dash. Electrically the job is simple: you wire a new button in parallel with the tiny button already on the remote's circuit board, so pressing the dash button does exactly what pressing the remote would. The result looks factory-installed, frees up cup-holder and console space, and stops the remote rattling around. The same approach adapts to other mounting spots discussed in the thread, such as the shelf under the parking-brake coin tray, the high-beam switch, or simply resting a small remote in the armrest slot. A security caveat applies throughout: anything that opens your home should not be easy to reach in a car that could be stolen. Adapted from a community writeup by petah on Club RSX (https://www.clubrsx.com/threads/diy-remote-garage-door-opener.189022/), including corrections from the follow-up discussion.
Hondata Intake Manifold Gasket (IMG) Installation on the Acura RSX (K20)
The factory intake manifold gasket on the aluminum-manifold K20 (Acura RSX, including the Type-S) is a thin metal piece that readily conducts engine heat into the manifold, warming the intake charge. Replacing it with the thicker, insulating Hondata gasket reduces that heat transfer and helps recover power lost during hot-weather or stop-and-go driving; the effect is most pronounced on the all-aluminum Type-S manifold and smaller on the base car's plastic manifold. The job is a straightforward parts swap in principle, but access to the lower manifold bolts is tight and the throttle body must be moved aside to reach them, so patience and the right extensions matter more than mechanical skill. No cooling-system drain is needed and the lower support bracket stays in place. Adapted from a community writeup by victor.s on Club RSX (https://www.clubrsx.com/threads/hondata-intake-manifold-gasket-install.189437/), including corrections from the follow-up discussion.
Building a Custom Fiberglass Front Lip and Splitter Base (7th-Gen Civic)
This guide covers fabricating a one-off front lip with an integrated flat splitter-mounting surface for a 7th-generation Honda Civic (EM2), where off-the-shelf lip options are scarce. Rather than buy a generic eBay piece, the build creates a custom lip inspired by the Js Racing FD2 profile, adapting its aggressive lines to the rounded 7th-gen bumper and eliminating the gap between lip and splitter. The method uses a shaped expanding-foam plug over a protective glass shell, refined with body filler and finished as a prototype from which a reusable mold can later be pulled. It suits fabricators comfortable with fiberglass, foam plug work, and long finishing cycles; expect a significant investment in materials and patience. Adapted from a community writeup by BlackNDecker on K20A.org (https://www.k20a.org/threads/diy-lip-and-splitter-build.111209/), including corrections from the follow-up discussion.
K-Series Swap Charge Harness Wiring (Civic EG/EK, Integra DC)
A K-series engine swap into a Honda Civic (EG or EK) or Acura Integra (DC2) requires rebuilding the charging and starting circuit, because the donor K20 distributes power differently than the D- or B-series it replaces. This guide explains how to adapt an RSX Type S (or EP3 Civic) charge harness so it feeds the starter, alternator, and under-hood fuse box correctly in the swapped chassis. It covers separating the low-current engine sensor leads that ship bundled inside the charge harness, choosing between the factory three-cable layout and the simplified single-feed (ChaseBays-style) approach, sizing and terminating the heavy battery cables, fabricating the fuse-box jumper, grounding the system, and testing the result so the starter cranks and the alternator charges. Read it before cutting anything: several builders found that with the battery and fuse box left in their stock locations, the harness can be adapted with almost no cutting at all. Adapted from a community writeup by k20jonny on K20A.org (https://www.k20a.org/threads/faq-how-to-wire-charge-harness-eg-dc-ek.91212/), including corrections from the follow-up discussion.
Building a K-Series Swap Conversion Wiring Harness for the Honda Civic (EG)
This guide covers building a custom K-series swap wiring harness for a 1992-1995 Honda Civic (EG) chassis, letting you integrate an RSX-based K20 engine and ECU without paying for a pre-made plug-and-play harness. The approach reuses two salvaged connectors - the C101 that mates to the K-series engine harness and the E-plug that feeds the ECU - plus three relays, and taps a short list of switched, sensor, and power circuits into the car's original ECU connector. Beyond the cost savings, the real payoff is a thorough understanding of how the swapped engine interfaces with the chassis electrically, which makes future troubleshooting far easier. The same core method has been adapted by the community to EF/CRX, EK, and DC2 chassis, though those cars use different main relays and cluster signals and require their own verification. Work slowly, label every wire, and confirm each connection with a multimeter before the first start. Adapted from a community writeup by kazino42 on K20A.org (https://www.k20a.org/threads/simple-wiring-harness-write-up-for-eg.11966/), including corrections from the follow-up discussion.
Honda CR-Z Front and Rear H Emblem Replacement (Red JDM Badges)
The CR-Z leaves the factory with plain H badges front and rear, and many owners swap them for the JDM-style red H emblems used on Honda's Type R models. This guide covers removing both factory emblems, cleaning off the old adhesive, and mounting the replacements so they sit level in the body recess. It applies to the Honda CR-Z, though the same technique works for any Honda whose badges are held by adhesive and a pair of locating posts. Because the popular red emblems are sourced from other Honda models (EP3, FD2, and similar), they tend to be a slightly different size than the stock indentation, so the procedure includes filling the recess with foam tape for a flush fit. It is a low-cost cosmetic upgrade that also lets you see exactly how the OEM badges are mounted. Adapted from a community writeup by hoisumguo on CRZ Forum (https://www.crzforum.com/threads/diy-replacing-emblems.2236/), including corrections from the follow-up discussion.
CR-Z Factory Navigation: Adding Auxiliary Video Inputs via a Navtool Interface
This guide covers adding two composite (RCA) video inputs to a US-spec Honda CR-Z fitted with the factory navigation head unit, so an external source such as a DVD player, portable media player, or reversing camera can be shown on the OEM navigation screen. The modification relies on a Navtool piggyback interface that intercepts the LCD's video ribbon and overrides the displayed picture on demand. Input 1 is selected manually with a dash-mounted switch, while Input 2 comes on automatically whenever reverse is engaged, which makes it well suited to a backup camera. Expect to permanently alter the head unit: extracting the ribbon and, in most cases, drilling out several seized screws means the CD mechanism can no longer be used and a full return to stock is unlikely. This is an involved electronics job with genuine fire and damage risk, best suited to owners comfortable with wiring, drilling, and delicate disassembly rather than anyone after a quick upgrade. Adapted from a community writeup by holeydonut on CRZ Forum (https://www.crzforum.com/threads/diy-add-auxilary-video-inputs-to-display-custom-video-on-stock-navigation-screen.6405/), including corrections from the follow-up discussion.
Honda CR-Z K&N Typhoon Short Ram Intake Installation
This guide covers swapping the factory airbox on a first-generation Honda CR-Z for the K&N 69-1018TS Typhoon short ram intake, a bolt-on kit that owners report improves throttle response, adds a deeper intake note, and yields a small mileage gain. The job replaces the stock airbox and intake tube with an aluminum tube, cone filter, and a heat shield that seals against the closed hood to draw cooler air. It applies to the 2011 CR-Z and, despite K&N listing only the 2011 fitment, has been confirmed by multiple owners to fit and run correctly on the 2012 car as well, including the CVT model. No permanent modification to the vehicle is required; every original part can be refitted. Expect to spend an hour and a half to two hours, and note that the printed instructions in the box run a few steps out of the most convenient order, which this guide corrects. Adapted from a community writeup by RicoMagic on CRZ Forum (https://www.crzforum.com/threads/diy-k-n-typhoon-sri-install.7381/), including corrections from the follow-up discussion.
Honda CR-Z: Swap the CVT Selector for a Honda Fit Leather Shift Knob
This guide replaces the factory selector knob on an automatic (CVT) Honda CR-Z with the leather-wrapped automatic shift knob from a Honda Fit, together with its matching plastic base cover. Owners often find the angular stock knob, sometimes called the "Star Trek" shifter, awkward to rest a hand on; the Fit knob offers a more conventional shape and a hand feel closer to a manual lever, and its blue stitching matches the stitching already present on the CR-Z steering wheel and armrest. The swap is a bolt-on: the Fit knob mounts to the same shift tree using the same two-screw pattern, so no cutting or wiring is involved. Budget roughly ten to fifteen minutes. The two parts needed are the Fit leather knob, part# 08U92-TK6-110A, and the plastic cover, part# 54132-TF0-951ZA; color variants exist, including a red-stitched version. Adapted from a community writeup by RicoMagic on CRZ Forum (https://www.crzforum.com/threads/diy-honda-fit-shifter-mod-cvt-models.9179/), including corrections from the follow-up discussion.
Honda CR-Z JDM Reverse-Tilt Passenger Mirror Installation
The reverse-tilt mirror is a Honda Access accessory sold only in the Japanese market that automatically angles the passenger-side door mirror downward whenever reverse gear is selected, giving a clear view of the curb and rear wheel while parking. Because it was never offered through US dealers, fitting it to a US-market CR-Z means adapting the Japanese add-on harness, whose door-connector pinout does not match the US wiring; left unchanged, both the power windows and the tilt module will fail to operate. Aside from re-arranging a handful of connector terminals, the remainder is essentially plug-and-play: mount the control module behind the passenger dash, add a fuse, dial in the desired tilt angle, and splice one wire into the reverse-lamp circuit. This guide applies to the Honda CR-Z. Right-hand-drive (JDM/EDM) cars that already run power-folding mirrors may find the tilt function plugs straight in, though the door harness can still need re-pinning. Adapted from a community writeup by ITEM9 on CRZ Forum (https://www.crzforum.com/threads/diy-jdm-reverse-tilt-mirror.9731/), including corrections from the follow-up discussion.
Honda CR-Z LED Rear Diffuser Reflector Light Installation
The CR-Z's rear diffuser carries a pair of plain reflector garnishes that can be swapped for LED-lit reflectors, adding a set of rear running lights that brighten under braking and closely mimic the factory LED tail lamps. This guide covers fitting an aftermarket set (commonly sold under the iJDMTOY / MotoringMax name on eBay) into a Honda CR-Z: tinting clear lenses to match smoked or red OEM lamps, routing and splicing the leads into the existing brake-light circuit, and fastening the units so the loose factory fitment does not let them drop out. It is an inexpensive, high-visibility upgrade, but the wiring differs between production batches, so the color mapping below reflects the corrections that later installers worked out rather than the original post. Adapted from a community writeup by Talk2meGOOSE on CRZ Forum (https://www.crzforum.com/threads/diy-led-rear-diffuser-lights-ijdm-toy.10936/), including corrections from the follow-up discussion.
Wiring DSM Low-Impedance Injectors into a Honda D-Series with Inline Resistors
Upgrading a Honda D-series engine to larger fuel injectors is a common step when adding boost or other airflow modifications, because the factory saturated injectors eventually run out of capacity. A popular budget choice is a set of 450cc low-impedance injectors pulled from a first- or second-generation DSM (Mitsubishi Eclipse/Talon). Because these are peak-and-hold (low-impedance) units and most Hondas are wired for high-impedance saturated injectors, they need extra resistance added to the circuit. Rather than buying a plug-in resistor box, this guide splices an inexpensive inline resistor into each injector signal wire, a job that costs only a few dollars in parts and takes about an hour. It covers preparing the injectors, fitting their O-rings to the D-series manifold, finding the correct wire at the injector power connector, and soldering the resistors in place. Note that cars already fitted with a factory resistor box (for example 4th-generation MPFI and certain SI models) can often run these injectors without this modification, and any injector change should be followed by ECU tuning. Adapted from a community writeup by Bizzar on D-Series.org (https://www.d-series.org/threads/diy-dsm-injector-and-resistor-wiring-install-pics.7216/), including corrections from the follow-up discussion.
Honda Civic Rear Drum-to-Disc Brake Conversion
This guide converts the rear drum brakes on a Honda Civic to disc brakes by transplanting rear disc hardware from a factory disc-equipped Honda or Acura. Except for the 99-00 Civic Si, most Civics of this era left the factory with rear drums; borrowing the trailing arm and brake assembly from a 99-00 Civic Si, a 94-01 Integra, or a Del Sol upgrades the rear to discs for stronger, more consistent braking. It applies broadly across the EG and EK Civic chassis, and the same procedure has been used successfully on the Del Sol. Two paths exist: transplant the entire rear trailing arm, which bolts straight to the Civic chassis, or move only the hub and brake assembly onto your existing arm to avoid a rear alignment. The hydraulic side matters as much as the hardware: on any chassis other than an EX with stock or soft suspension, matching the proportioning valve (and often the master cylinder) is mandatory so the rear brakes do not over-apply and lock. Budget most of a day for a first attempt, or roughly two hours with an experienced helper. Adapted from a community writeup by Rexinre on D-Series.org (https://www.d-series.org/threads/rear-disk-conversion-how-to.15258/), including corrections from the follow-up discussion.
8th-Gen Honda Civic Sedan Trunk Damper Kit Installation
This guide covers fitting a bolt-on trunk damper kit to an 8th-generation Honda Civic sedan, so the trunk rises in a controlled, assisted motion and holds itself open instead of relying on the factory torsion springs. The kit referenced here is the sedan-specific set from RoBear Racing made by FaVES; it is not compatible with the coupe body. The work is straightforward, roughly a half-hour job needing only hand tools, a drill, and the rivet-nut tool included in the kit. The one point of real care is sizing the lower mounting holes so the rivet-nut inserts clamp firmly rather than spin. Adapted from a community writeup by obert on 8th Civic (https://www.8thcivic.com/threads/diy-trunk-dampers.237832/).
OEM Roof Rack Installation on the First-Generation Acura RDX
This guide covers installing the factory OEM roof rack on the first-generation Acura RDX (2007 onward). Unlike a simple bolt-on aftermarket rack, the factory system anchors to hidden points beneath the roof's black edge molding, so the job requires carefully removing that molding, trimming it to clear the mounting brackets, and refitting it around the new rails. Done correctly it looks factory-clean and leaves no wind-noise gaps. The work is well within a careful DIYer's reach and takes roughly two hours, but the molding is black-coated aluminum that creases permanently if mishandled, and the cuts you make are not reversible, so patience and accurate measurement matter far more than speed. Expect a modest fuel-economy penalty, and note that the factory rack is light-duty; owners hauling heavy or long loads often prefer a stronger aftermarket system. Adapted from a community writeup by allencic on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/diy-roof-rack-installation-tips-681589/), including corrections from the follow-up discussion.
Acura RDX Brake Caliper Refinishing and Full Brake Service
This guide covers refinishing and reinstalling the brake calipers on the first-generation Acura RDX, pairing a durable two-stage caliper paint job with a full brake service. The finish system uses POR-15 as a corrosion-proof base beneath a heat-rated VHT top coat; together they resist chipping and stay glossy through years of daily driving, and reports in the discussion confirm no chipping or loss of gloss after 13,000 miles and calipers still looking near-new at two years and 35,000 miles. Along the way the calipers, brackets, and hardware are cleaned to bare metal, the rotors and parking-brake parts are measured against their service limits, and everything is reassembled to the correct torque values and bled. It applies to RDX models with the usual single-piston floating calipers and the drum-in-hat rear parking brake. Do it to shield the calipers from road-salt corrosion, keep them easy to clean, and refresh worn pads at the same time. Adapted from a community writeup by 737 Jock on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/diy-brake-caliper-painting-776569/), including corrections from the follow-up discussion.
Acura RDX Automatic Transmission Fluid Drain and Fill (1st Gen)
This guide covers a drain-and-fill service of the automatic transmission on the first-generation, turbocharged Acura RDX (2007-2012), performed here on a 2008 model. A drain-and-fill exchanges the fluid that the case will release through its drain plug and is a simple way to refresh degraded automatic transmission fluid on a regular maintenance interval; it does not fully flush the torque converter or cooler lines. The factory specification for this gearbox is Honda ATF-Z1. The original writer substituted Castrol Import Multi-Vehicle ATF, which is marketed as meeting the Z1 requirement, but running the factory-specified fluid is the conservative choice. Mechanically the job is easy; the real challenges are the unlabeled fill plug buried beside the brake fluid reservoir and the patience it takes to route a funnel down to it. The method returns the same measured volume that came out, which on this service was roughly 3.7 to 3.8 quarts. Adapted from a community writeup by ptrapper65 on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/diy-acura-rdx-tranny-fluid-change-792834/), including corrections from the follow-up discussion.
Rear Lowering Spring Install (Acura RSX / Honda Civic Si EP3)
This guide covers swapping the factory rear coil springs for shorter lowering springs on the 2002-2006 Acura RSX (DC5) and the 2002-2005 Honda Civic Si (EP3), which share the same rear strut design. The job drops the rear ride height for a lower stance and reduced fender gap while reusing the original dampers and mounting hardware. It is a mechanically involved task rather than a beginner one: the lower mounting bolt is extremely tight, the strut must be dismantled and rebuilt in a precise order, and a loaded coil spring can be dangerous, so read the safety notes before starting. The stock bumpstop is trimmed to suit the shorter spring, and once finished the car should be aligned. Adapted from a community writeup by Ju5t Ep3 Pr4ct1c3 on Club RSX (https://www.clubrsx.com/threads/diy-rear-lowering-spring-install.371462/), including corrections from the follow-up discussion.
Acura RSX / Honda Civic Si (K20) Engine Oil and Filter Change
This guide covers a complete engine oil and filter change on the 2002-2006 Acura RSX and the 2002-2005 Honda Civic Si (EP3). It applies to the K20A3 engine used in the base RSX and the Civic Si as well as the K20A2 used in the RSX Type-S; the two engines differ in drain plug torque and oil capacity, so both figures are called out where they matter. Regular oil changes are the single most important thing you can do to keep these engines healthy, and the job is well within reach of a first-time home mechanic. Running the engine for a few minutes beforehand thins the oil so it drains faster and carries out more contaminants. Read the whole procedure before starting, and note the drain plug torque was corrected during the discussion (29 lb-ft for the Type-S, not 33) and the Type-S fill quantity was clarified against the factory manual. Adapted from a community writeup by Ju5t Ep3 Pr4ct1c3 on Club RSX (https://www.clubrsx.com/threads/diy-oil-change.374897/), including corrections from the follow-up discussion.
Progress 22mm/24mm Rear Sway Bar and Tie Bar Installation (RSX / EP3 Civic Si)
This guide covers fitting a Progress 22mm or 24mm rear sway bar, together with the matching reinforcement tie bar and heim-joint endlinks, to the 2002-2006 Acura RSX (DC5) and the 2002-2005 Honda Civic Si (EP3). A stiffer rear anti-roll bar cuts body roll and shifts the chassis balance toward quicker turn-in, both on the street and at the track. Mechanically the swap is not complex, but two tasks lift it above a basic bolt-on: freeing the factory endlinks, whose ball-studs spin freely and often seize from corrosion, and repositioning the lower control arms when the Progress tie bar is added. Two kit differences were confirmed by owners in the thread: the 24mm bar is adjustable and ships with its own heim endlinks, while the 22mm bar reuses the factory endlinks because Progress supplies none with it. If you are only changing the bar and keeping the factory brace and endlinks, the control-arm and tie-bar work does not apply to you. Adapted from a community writeup by Ju5t Ep3 Pr4ct1c3 on Club RSX (https://www.clubrsx.com/threads/diy-22mm-24mm-progress-rear-sway-bar.374973/), including corrections from the follow-up discussion.
Fujita Cold Air Intake Installation (7th Gen Honda Accord)
This guide covers replacing the factory airbox, intake tube, and fender-well resonator on a 7th generation Honda Accord (2003-2007) with a Fujita cold air intake, relocating the filter into the driver's-side wheel well for cooler intake air and a more pronounced high-RPM intake note. It applies to both the I4 and V6 engines and to automatic and manual cars, though the sensor arrangement and a few V6-specific hose steps differ as noted. Owners report a bolt-on fit with no cutting or fabrication required; the one genuinely awkward stage is extracting the resonator box, which is the reason the job earns a moderate rather than easy rating. Budget a couple of hours and work carefully around the plastic clips, several of which are fragile. Adapted from a community writeup by joerockt on DriveAccord (https://www.driveaccord.net/threads/fujita-cai-diy-7th-gen-56k-beware.5456/), including corrections from the follow-up discussion.
Acura 3.0/3.2 V6 Idle Air Control Valve: Throttle Body Removal, Cleaning, and Replacement
The idle air control valve (also called the ICV or IACV) meters the small amount of air the engine draws at idle. When it clogs with carbon or its electric actuator fails, the first-generation Acura 3.0CL, the TL 3.2, and the related 1998-2001 Honda Accord V6 will hunt, surge, or stall at idle — a common pattern is the tachometer wandering on its own between roughly 1000 and 2500 rpm, or the idle dropping and shuddering when the air conditioning loads the engine. It frequently sets a P0505 (idle control system) or P1676 code. This guide walks through removing the throttle body to reach the valve on the underside, then either cleaning the valve or fitting a new one. Budget about an hour or two the first time; a straight swap once you know the layout takes well under an hour. Adapted from a community writeup by joeshmoe on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/install-thottle-body-idle-control-valve-3-0-motor-458330/), including corrections from the follow-up discussion.
Acura CL (1G) Black-Housing Headlight Conversion
This guide covers converting the chrome-trimmed headlamps of a first-generation Acura CL to a blacked-out look by opening each sealed assembly, painting the internal chrome bezel flat black, and resealing the lens. The front bumper cover must come off to reach the lower headlamp fasteners, so that removal is part of the job. The result darkens the reflector trim for a more aggressive front end while keeping the factory lenses and any HID retrofit in place. The single biggest risk is trapped moisture, so most of the care goes into curing the paint away from the assembly and resealing the lens thoroughly. Plan for one evening of hands-on work spread around overnight drying time. Adapted from a community writeup by klepto on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/black-housing-headlights-w-front-bumper-removal-470662/), including corrections from the follow-up discussion.
Honda Fit (GE8) JDM 11-Pin Folding, Heated Door Mirror Retrofit
This guide covers retrofitting a full-feature JDM door mirror onto a second-generation USDM Honda Fit (GE8, 2009-2013). The top JDM mirror combines a folding motor, an integrated LED turn-signal repeater, a heated glass element, and the receiver for Japan's keyless-entry system, and it uses an 11-pin connector; lower-spec castings exist with 7 pins (fold plus signal) or 9 pins (adding either heat or keyless). Because US cars never offered these features, none of it is plug-and-play: the mirror must be bench-tested, its wiring reverse-mapped, and a custom harness built to tie the fold motor into an illuminated CR-V switch, the heater into the rear-defroster circuit, and the adjust and signal wires into the door harness. The Japanese keyless receiver cannot be made to work without dealer programming and a matching key, so it is left dormant. Follow the wire-color and pin references exactly, because a miswire can drive the fold motor the wrong way or backfeed the heater. Adapted from a community writeup by BMW ALPINA on FitFreak (https://www.fitfreak.net/forums/2nd-gen-ge8-specific-fit-exterior-modifications-jdm-styling-sub-forum/77807-diy-11-pin-door-mirror-folding-heated-smart-key.html), including corrections from the follow-up discussion.
Acura CL (2.2/2.3) Clutch and Flywheel Replacement
Replacing the clutch on the first-generation Acura CL (2.2CL and 2.3CL, 1997-1999) is a major driveline job that requires dropping the manual transaxle out of the car. This guide covers a full clutch disc and pressure plate replacement, with the option to swap or resurface the flywheel at the same time; the original build paired an Exedy Stage 1 clutch with an ACT lightweight flywheel. Because the front-wheel-drive transaxle sits behind the engine, the axles, shift linkage, hydraulic slave cylinder, and several mounts all have to come apart before it will drop. Plan on roughly six to eight hours if everything cooperates, and expect the first attempt to run longer. Doing it yourself saves the several hundred dollars of shop labor this job commands and lets you fit a performance clutch and flywheel while you are in there. Adapted from a community writeup by Wannarace62188 on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/diy-clutch-replacement-480067/), including corrections from the follow-up discussion.
Acura CL Clear Corner Lights: Blacked-Out Housing Conversion
The clear corner marker lamps on the first-generation Acura CL leave the internal reflector bright chrome, which many owners want darkened for a cleaner, blacked-out front end. This guide covers the full process of splitting a sealed clear corner lamp, painting the inner reflector housing flat black, and resealing it so it stays weather-tight. It applies to the bonded clear corner assemblies used on the 1G CL and similar Acura corner lenses of that era. Note that these lenses are glued rather than silicone-sealed like a headlight, so the oven-warming trick used on headlights will not open them and will only deform the plastic. Because darkening the reflector reduces how much light the marker throws, treat this as a cosmetic modification and confirm the lamp still meets your local visibility requirements. Budget for a spare set of corners, since replacements are inexpensive if a lens cracks during opening. Adapted from a community writeup by acuratl_2nr on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/diy-blackhousing-clear-corners-483145/), including corrections from the follow-up discussion.
Honda Fit (GE) Satellite Radio Installation
This guide covers installing a satellite radio receiver, such as a Sirius Sportster, in the second-generation Honda Fit, with notes that also apply to the earlier GD chassis. It walks through pulling the factory head unit far enough to route cabling cleanly, adding a dedicated 12V accessory outlet to power the receiver, mounting the antenna on the roof and routing its cable into the cabin through the hatch, and feeding audio to the head unit's auxiliary input. The aim is a tidy result with almost no visible wiring rather than a plug hanging loosely from the dash. Because many current satellite receivers step 12V down to 5V through a transformer built into their supply cable, a dedicated outlet keeps the power source correct and flexible for a future receiver swap. Adapted from a community writeup by notorious.dds on FitFreak (https://www.fitfreak.net/forums/2nd-gen-ge8-specific-fit-interior-modifications-sub-forum/36490-how-install-guide-xm-sirius-radio.html), including corrections from the follow-up discussion.
Acura CL (1st Gen) Steering Wheel Removal and Replacement
This guide covers taking the factory steering wheel off a first-generation Acura CL (1997-1999) and installing a replacement, whether the goal is fixing a worn or damaged wheel or upgrading to a leather or woodgrain wheel from a later CL, TL, or MDX. Because the wheel carries a live SRS airbag, the work involves disabling the restraint system, releasing the airbag module, drawing the wheel off its splined shaft with a puller, and transferring the control-switch brackets and trim before reassembly. It is well within reach of a careful home mechanic, but the airbag and the clock spring behind the wheel demand respect and patience. Adapted from a community writeup by saiko_cl_duck on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/1st-gen-cl-steering-wheel-diy-w-pics-486041/), including corrections from the follow-up discussion.
Honda Fit (GE8) Factory Center-Console Armrest Installation
This guide covers fitting the genuine Honda center-console armrest kit to a second-generation Honda Fit (GE8), replacing the small Sport-model pad with the larger padded armrest and its associated console hardware. It applies to GE8 Fit models, including automatic and manual cars. The job involves stripping the factory armrest, pulling the center console, bolting in a new mounting bracket, and drilling several holes in the console so the armrest assembly can be fastened down, so it is more involved than a bolt-on accessory but well within reach of a careful home mechanic in under an hour. Honda advises against fitting the armrest to manual-transmission cars, but owners confirm the unit clears the shifter without interfering with gear changes. Adapted from a community writeup by jamfred on FitFreak (https://www.fitfreak.net/forums/2nd-gen-ge8-specific-fit-interior-modifications-sub-forum/62879-diy-ge8-factory-armrest-install.html), including corrections from the follow-up discussion.
Honda Fit (GE8) Automatic Climate Control Retrofit Using EDM Jazz Hardware
This guide covers retrofitting factory automatic climate control into a North American second-generation Honda Fit (GE8) using the electronic HVAC hardware Honda fitted to European-market Jazz models but never offered in the US or Canada. The conversion replaces the three cable-operated rotary knobs with a self-managing head unit that governs temperature, fan speed, air distribution, and recirculation through servo motors fed by cabin, evaporator, sunlight, and outdoor sensors. Because the work is extensive and hard to undo, the original wiring and connectors are left intact so the car can be returned to stock if necessary. Expect roughly fifteen hours of work across a full weekend, a good deal of soldering, and some trimming of interior plastic. A Jazz electronic service manual (Windows XP only) is essential for the pinouts and the post-install diagnostics. Note that European donor displays read in Celsius; only the Fit EV unit shows Fahrenheit. Adapted from a community writeup by connor55 on FitFreak (https://www.fitfreak.net/forums/2nd-generation-ge8-specific-diy-repair-maintenance-sub-forum/78713-diy-automatic-climate-control-conversion.html), including corrections from the follow-up discussion.
Aftermarket H7 HID (Xenon) Headlight Conversion for the Honda Civic
This guide covers retrofitting an aftermarket H7 HID (xenon) kit into a Honda Civic to replace the standard halogen H7 bulbs, producing a brighter, whiter 5000K beam. Because a typical kit does not include hardware to secure the ballasts, it also walks through fabricating simple mounting brackets and adapting the headlight dust covers and bulb clips so the new bulbs and igniter leads fit cleanly. It suits owners comfortable with light fabrication, drilling, and basic 12V wiring. Note that engine-bay layout varies between Civic body styles, so routing may differ on four-door sedans. Adapted from a community writeup by ante00 on Civinfo (https://www.civinfo.com/threads/install-aftermaket-xenon-lights-on-civic.7176/), including corrections from the follow-up discussion.
Parrot MKi9200 Bluetooth Kit Installation in the Honda Civic (FN2 Type R)
This guide covers fitting a Parrot MKi9200 Bluetooth hands-free and media kit into an eighth-generation Honda Civic, including the FN2 Type R, using a car-specific SOT-908 sound-off-talk adapter so the factory head unit and its steering-wheel controls stay intact. The MKi9200 drives the front speakers directly, which lets it operate with the stereo switched off and gives cleaner audio than the standard Honda hands-free. Owners of the 2008 Accord and the EX sat-nav variants have followed the same method. Expect to strip the centre console, gear surround, driver's side trim and head unit to reach the wiring, then route the microphone to the roof lining and the colour display to the top of the dash. The work is straightforward but fiddly, and the single most important detail is the orientation of the power leads at the kit's bullet connectors: get it wrong and the unit will not shut down cleanly. Adapted from a community writeup by colthillary on Civinfo (https://www.civinfo.com/threads/guide-how-to-install-a-parrot-mki9200-into-a-honda-civic-type-r.37816/), including corrections from the follow-up discussion.
HID Headlight Conversion for the Honda Civic Type R (FN2)
This guide covers retrofitting an HID (xenon) conversion kit into the halogen dipped-beam headlamps of the 8th-generation Honda Civic Type R (FN2), and it applies equally to the Type S and Type S GT, which share the same reflector-style housings. Because these lamps use a reflector rather than a projector, you must buy an H7R kit; a plain H7 kit will physically fit but scatters light badly and dazzles oncoming traffic. The result is a far brighter, whiter beam than the weak factory halogens. Budget roughly two hours and work one side at a time. Note the legal position before you start: in the UK, aftermarket HIDs fitted into reflector halogen lamps are not compliant with Construction and Use regulations, which call for headlamp washers and self-levelling, so weigh that up and declare the change to your insurer. Adapted from a community writeup by Loxy on Civinfo (https://www.civinfo.com/threads/how-to-fit-a-hid-kit-to-type-r.44629/), including corrections from the follow-up discussion.
Honda Fit (GE8) Aftermarket Head Unit, Amplifier and Subwoofer Installation
This guide covers a complete aftermarket audio upgrade for the second-generation Honda Fit (GE8): replacing the factory head unit with a single-DIN receiver, adding a monoblock amplifier, and installing a dual-voice-coil subwoofer. It walks through adapting the wiring harness, routing a 4-gauge power feed from the battery to the hatch, keeping signal and power cables separated for clean audio, wiring the subwoofer for the correct impedance, and finishing with a hidden, factory-look result. The most important lesson from the original build is impedance: a dual 4-ohm subwoofer on a mono amp must be wired in parallel for a 2-ohm load, not in series, which produces a quiet 8-ohm load until corrected. Follow-up posts also clarify harness wire colors and a passenger airbag-indicator pitfall during reassembly. Adapted from a community writeup by Vash on FitFreak (https://www.fitfreak.net/forums/2nd-generation-ge8-specific-fit-i-c-e-sub-forum/69160-diy-headunit-amp-subwoofer-guide-vash-lots-pics.html), including corrections from the follow-up discussion.
Honda Fit (GK) Halogen-to-Projector Headlight Retrofit
This guide covers converting the factory halogen reflector headlights on the third-generation Honda Fit (GK, roughly 2015-2020) to HID bi-xenon projectors. Retrofitting projectors gives a sharp, aimable beam with a defined cutoff instead of the scatter of the stock reflector, and it lets you customize the housing internals (painted bowls, custom shrouds, DRL strips) while you have the lens open. The job involves opening the sealed housings with heat, modifying the reflector bowl and projector flange so the unit mounts flush, wiring an HID kit, and resealing everything. It is involved and easy to ruin a housing, so budget time and buy the projectors, shrouds, ballasts and harness before starting. This writeup reflects the X-lens/Panasquare build; an O-lens with Apollo shrouds follows the same overall process. Adapted from a community writeup by noripwr on FitFreak (https://www.fitfreak.net/forums/3rd-gen-gk-specific-fit-exterior-modifications-jdm-styling-sub-forum/85242-how-projector-retrofit-your-gk.html), including corrections from the follow-up discussion.
Honda Civic 5-Door to Type R/S Body Kit Conversion (8th Gen FK)
This guide covers converting the standard exterior of an 8th-generation Honda Civic 5-door hatchback (FK) to the Type R / Type S look by fitting genuine Type R/S panels: front and rear splitters, all four wheel arches, both side skirts, the exhaust trim triangles and the rear reflectors. It is purely a cosmetic bumper-and-trim swap with no structural or mechanical work, but it is fiddly plastic-trim removal that rewards patience and the correct clips. Because the donor panels come from the 3-door Type R (FN2), several parts do not sit perfectly flush on the wider 5-door shell: the rear arches need modified clips or cut-and-shut work, a small gap remains at the rear door/skirt junction, and the tailpipe can vibrate against the new triangles. Each of these has a known remedy, all covered below. Read the whole guide and gather every panel before you begin, since a half-finished conversion simply leaves the car looking undressed. Adapted from a community writeup by geemac on Civinfo (https://www.civinfo.com/threads/how-to-5-door-type-r-conversion.70495/), including corrections from the follow-up discussion.
Honda Civic (FK): Fitting a Type R (CTR) Rear Centre Light Panel
This guide covers swapping the standard rear centre light panel on a pre-2009 (pre-facelift) eighth-generation Honda Civic hatch for the Civic Type R (CTR) centre light strip, giving the rear end the sought-after Type R appearance. Because the ordinary car locates its rear fog lamp inside the centre cluster while the Type R panel has no fog position, the job is more than a straight swap: the fog must be relocated and rewired so the car stays road-legal. It applies to UK/EU FK-generation Civics fitting an FN2 Type R centre panel, and touches on the related brake/fog side panels and bulb-holder fitment issues that come with the conversion. Expect to remove the inner tailgate trim (or work through the bulb covers with a spanner), transfer bulbs, and carry out some connector-level rewiring. Adapted from a community writeup by Syx on Civinfo (https://www.civinfo.com/threads/how-to-replace-rear-centre-light-panel-pre-2009.70681/), including corrections from the follow-up discussion.
Honda Fit (GD): Independent Fog Light Control Using the Factory Switch
The factory wiring on the second-generation Honda Fit (GD) only allows the fog lamps to switch on once the headlights are already lit. This modification reroutes the fog trigger circuit through a fused tap in the interior fuse panel so the existing dash switch can turn the fog lights on by themselves, independently of the headlights. It is a low-cost, reversible interior electrical job that requires no drilling and no new switch. Note that this procedure keeps the fogs tied to the factory logic, so they will still cut out when the high beams are engaged and will dim with the dash at night; wiring them to stay on with high beams is a separate relay job not covered here. Adapted from a community writeup by SickFit on FitFreak (https://www.fitfreak.net/forums/fit-diy-repair-maintenance/26959-diy-independent-fog-w-original-switch.html), including corrections from the follow-up discussion.
Honda Fit Exhaust Header Removal and Aftermarket Header Installation
This guide covers removing the factory exhaust header (manifold) from a Honda Fit and bolting on an aftermarket 4-2-1 header such as the Weapon R street header. It applies to the GD and GE Fit and is a popular modification for a freer-breathing exhaust note along with modest mid-range and top-end gains. Mechanically the job is simple; the real difficulty lies in freeing the seized, awkwardly located header fasteners and cleanly disconnecting the oxygen sensor in a cramped bay. With penetrating oil, a length of pipe or a breaker bar for leverage, and some patience, most owners can finish it in an afternoon. Adapted from a community writeup by suketoborudo00 on FitFreak (https://www.fitfreak.net/forums/fit-diy-repair-maintenance/42608-diy-header-removal-installation-help-tips.html), including corrections from the follow-up discussion.
Honda Fit Adhesive Door Sill Cover Installation
The painted door sill on a Honda Fit is exposed every time someone steps in or out, and the bare finish scuffs and scratches easily. Bonding a set of flat adhesive-backed sill covers over that surface protects the paint and gives the door openings a finished look. The panels sold for this purpose—JDM Honda pieces, Mugen, and various aftermarket copies—are functionally identical: a rigid appliqué with a strong pressure-sensitive adhesive on a peel-off paper backing. The install needs no tools and no fasteners, but the adhesive grabs hard and is effectively permanent, so success rests almost entirely on cleaning the surface thoroughly and confirming alignment before the glue ever touches paint. This guide covers all four sills on a Honda Fit and applies to any adhesive-backed sill panel of this style. Adapted from a community writeup by Chikubi on FitFreak (https://www.fitfreak.net/forums/fit-diy-repair-maintenance/5807-diy-door-sill-install.html), including corrections from the follow-up discussion.
DIY Budget Short Ram Intake for the Honda Fit
This guide covers assembling a low-cost short ram intake for the first-generation Honda Fit from off-the-shelf Spectre parts-store components, a popular alternative to spending several hundred dollars on a name-brand kit. The parts run roughly $50-65 total. The payoff is a tidy engine bay, a more assertive induction note that stays civil even at wide-open throttle, and, by many owners' accounts, a small bump in throttle response and mixed-driving fuel economy. It fits both manual and automatic cars with no clearance conflicts once the filter is positioned correctly. Because this is a short ram and not a true cold air intake, where the filter sits matters: routing it forward of the battery and away from the radiator's heat keeps intake temperatures in check. Adapted from a community writeup by Sid 6.7 on FitFreak (https://www.fitfreak.net/forums/fit-engine-modifications-motor-swaps-ecu-tuning/24533-official-ssr-intake-diy-thread-sid-short-ram-intake.html), including corrections from the follow-up discussion.
Acura RSX (DC5) Custom 8-Point Engine Ground Kit
This guide covers building and installing a custom eight-point grounding harness on the Acura RSX (DC5, including the Type-S) with the K20 engine and electric power steering. The goal is to lower the electrical resistance between the battery negative terminal and the engine, transmission, and chassis so that current has clean, low-impedance return paths under load. Building your own harness from bulk 8-gauge wire and soldered ring terminals lets you place grounds exactly where the car needs them and costs roughly $60 in materials, versus over $100 for a branded kit. Grounding upgrades are a debated modification: measurable benefit is largest on cars carrying many electrical accessories, or on cars that lost low-end response after fitting an aftermarket header or test pipe. The value here is verified with a multimeter rather than assumed, so you can confirm each connection actually improved before and after. Adapted from a community writeup by Ju5t Ep3 Pr4ct1c3 on Club RSX (https://www.clubrsx.com/threads/diy-custom-8-point-ground-kit.317039/), including corrections from the follow-up discussion.
Trunk CCFL (Cathode) Accent Lighting Install with 3-Position Selector
This guide covers adding a pair of 12-inch cold-cathode (CCFL) tubes inside the trunk of an 8th-generation Honda Accord for accent and utility lighting. The install taps the existing trunk-lamp feed rather than running a fresh circuit, and optionally routes it through a small selector switch so you can choose the factory bulb, the cathode tubes, or nothing at all - handy if you want the glow most of the time but a clean stock look on occasion. Expect roughly a couple of hours if you build the full switched version, most of which is soldering, heat-shrinking, and verifying the switch behavior; a stripped-down always-on version can be done in minutes. Basic soldering skill is the main prerequisite. Adapted from a community writeup by mnkyman on DriveAccord (https://www.driveaccord.net/threads/diy-trunk-cathodes.9635/), including corrections from the follow-up discussion.
Honda Civic Interior LED Accent Lighting Install (Dual-Zone Switched)
This guide covers adding switchable LED accent lighting to the interior of an eighth-generation Honda Civic (2006-2011), using a pair of six-LED pods for the front footwells and a pair of three-LED strips for the rear seating area. Each zone gets its own dashboard switch, so the front and rear lights can run independently or together, and the whole system draws from the center console's 12V accessory circuit. The work involves pulling the center console, tapping the cigarette-lighter feed, routing concealed wiring, and mounting the lights so the emitters stay hidden while they wash the floor with light. It is a rewarding weekend electrical project that gives the cabin a clean, custom glow with no visible hardware. Read through every step before starting, because the console has to come out and the battery must be disconnected first. Adapted from a community writeup by 2008fijibluesi on Honda-Tech (https://honda-tech.com/forums/lighting-107/diy-led-interior-lighting-pt1-2211648/), including corrections from the follow-up discussion.
Fabricating Custom Steel Brake Hard Lines and Relocating the Proportioning Valve (Honda EG/EK/DC2)
Bending and flaring your own steel brake hard lines lets you re-route the system cleanly around an engine swap, a wire tuck, or a relocated proportioning valve on a Honda EG/EK Civic or DC2 Integra. This guide covers fabricating 3/16-inch steel lines from start to finish: choosing materials, cutting, bending to follow the factory routing, fitting the correct nuts, and forming proper 45-degree double flares that hold full system pressure. It also explains why brake lines must be double-flared and how to move the proportioning valve without upsetting front-to-rear balance. Because the proportioning valve reacts only to hydraulic pressure and is unaffected by gravity or orientation, it can be mounted almost anywhere, which is handy when a turbo manifold or other hardware crowds the stock location. Brake work is life-safety work, so treat every flare and fitting as critical and test carefully before driving. Adapted from a community writeup by blackEK on K20A.org (https://www.k20a.org/threads/my-brake-system-write-up-get-comfortable.23063/), including corrections from the follow-up discussion.
Honda CR-Z Short-Shift Adapter and Hard-Mount Bushing Installation (H-Fit Kit)
This guide covers fitting an H-Fit short-shift adapter and aluminum hard-mount bushing kit to a 2011 Honda CR-Z. The kit is engineered for the 2009+ GE8 Honda Fit, whose factory shifter shaft is roughly 1mm smaller in diameter than the CR-Z's, so the adapter bore must be reamed slightly before it will slip on. The adapter clamps to the lower end of the OEM shifter stalk and extends it 18mm below the pivot; by simple leverage this shortens the throw. Swapping the soft OEM rubber mounts for solid aluminum bushings sharpens the feel further, giving a crisp, mechanical shift. The reported result is a throw cut from a little over 4 inches to about 3-1/8 inches. Because this repurposes a Fit-specific part, treat every fitting operation as a modification performed at your own risk. Adapted from a community writeup by SS2CRZ on CRZ Forum (https://www.crzforum.com/threads/diy-h-fit-short-shifter-hard-mount-kit-installation.9758/), including corrections from the follow-up discussion.
Retrofit Acura TSX Homelink Into a Honda CR-Z EX Overhead Console
This guide covers adding factory Homelink garage-door control to a 2011+ Honda CR-Z EX by substituting the overhead interior-light switch with the Homelink-equipped assembly from a 2003-2005 Acura TSX. The TSX unit shares the CR-Z's overhead footprint and brings three features in one part: programmable Homelink buttons, blue ambient console lighting, and a HandsFree Link (HFL) microphone. It drops into the EX's existing 10-pin harness with no cutting or permanent changes, provided you reorder the connector pins and add one wire for constant battery power. The trade-off is the loss of the switch's middle 'ON' dome-light position; only 'OFF' and 'DOOR' remain, and this cannot be restored by repinning because the switching logic lives on the module's circuit board. The procedure applies to the EX trim, which already has the 10-pin connector and switched power in the headliner; base cars use a different 4-pin connector and lack switched power at that location, so they need extra wiring. Adapted from a community writeup by ITEM9 on CRZ Forum (https://www.crzforum.com/threads/diy-tsx-homelink-on-cr-z-ex.10452/), including corrections from the follow-up discussion.
Installing the K&N 69-1018TS Typhoon Intake on a Honda CR-Z
The K&N 69-1018TS Typhoon is a bolt-on short-ram air intake for the Honda CR-Z that replaces the factory airbox, scoop, and paper filter with a reusable cotton-gauze filter on an aluminum pipe inside a heat shield. Beyond a modest gain in intake sound and airflow, the kit reroutes a coolant loop and the crankcase vent that originally passed through the stock airbox, so the job is more involved than a simple drop-in filter swap. It suits any CR-Z owner comfortable working under the hood; no special tools are required, but the coolant work and a finicky filter-to-pipe fit make patience worthwhile. This guide consolidates the complete install together with the fixes owners found for the most common snag, an intake pipe that appears too short for the filter clamp, which is solved by correctly orienting the angle bracket. Adapted from a community writeup by JohnnyXmas on CRZ Forum (https://www.crzforum.com/threads/diy-k-n-69-1018ts-typhoon-air-intake-installation.11229/), including corrections from the follow-up discussion.
Honda CR-Z Eibach Pro-Kit Lowering Spring Installation (Hand Tools)
Eibach Pro-Kit lowering springs give the first-generation Honda CR-Z a modest drop of roughly 1 to 1.5 inches while keeping ride comfort close to stock and noticeably tightening body roll under cornering. This guide covers a full front and rear installation done entirely with hand tools, without a lift or air tools, including the two steps the factory instructions gloss over: trimming the bump stops and dealing with the rear crush sleeve. It applies to the ZF1 CR-Z and folds in fixes and cautions raised later in the discussion, such as what to do when the rear crush sleeve is crimped onto the shaft and how to tell a genuine spring fault from an unrelated sway-bar clunk. Adapted from a community writeup by sohcsol on CRZ Forum (https://www.crzforum.com/threads/my-eibach-springs-at-home-install-write-up-review.4075/), including corrections from the follow-up discussion.
Honda Prelude (4th Gen) Projector Headlight Retrofit
This guide covers converting the sealed reflector headlights on a fourth-generation Honda Prelude to a projector setup, so the car throws a sharp, level cutoff and far better night-time light than the factory optics. The method opens the headlight, mounts a small projector (Acura TSX clear-lens optics are the common choice, with BMW E46, Honda S2000, and Lexus RX330 projectors as alternatives), dresses it with a shroud, and reseals the assembly for an HID kit. The same approach applies to both the JDM one-piece lens and the USDM housings, and it typically costs a few hundred dollars less than buying finished retrofit lights. Plan on fabrication: you will trim the reflector and interior plastics, build or adapt a shroud, and dial in the aim by hand. Adapted from a community writeup by n0rmaL on PreludePower (https://www.preludepower.com/threads/official-retrofit-picture-thread.325818/), including corrections from the follow-up discussion.
Honda H22 Complete Engine Build for Forced Induction (Turbo/Supercharger)
This guide covers a complete, boost-ready rebuild of the Honda H22 engine, the approach needed to reliably turbocharge (or supercharge) a Prelude rather than simply bolting a kit onto a stock long-block. It explains why the factory FRM cylinder liners must be replaced with cast-iron sleeves before forged pistons can be used, how to choose internals and compression for the boost level you intend to run, which supporting parts (bearings, seals, belts, pumps, clutch) should be renewed while the engine is apart, and how to manage and tune the finished combination. It applies to H22-powered Preludes and the closely related H23, and the same logic guides H-series builds swapped into other chassis. This is an expert-level, high-cost project that depends on quality machine work and professional tuning, so plan the full budget before ordering any parts. Adapted from a community writeup by Keahistight on PreludePower (https://www.preludepower.com/threads/step-by-step-to-correctly-build-and-boost.236053/), including corrections from the follow-up discussion.
Honda Civic (2006-2010) Hood Damper (Gas Strut) Installation
Hood dampers replace the factory prop rod with a pair of gas struts that hold the hood up on their own and let it rise and settle smoothly. This guide covers fitting a two-damper FAVES kit to the 2006-2010 Honda Civic, demonstrated here on an FA5 Si sedan. Coupe fender mounting points differ, and the plastic-trimming operations below are not required on coupe bodies. Running two struts rather than a single unit gives balanced, secure support and does not rely on adhesive tape to retain the brackets. The work is mostly straightforward, but it includes shaving a fender trim panel flat and starting a nut in a blind pocket behind the cooling plate, so treat it as a patience job rather than a hard one and leave the hardware loose until everything lines up. Adapted from a community writeup by obert on 8th Civic (https://www.8thcivic.com/threads/diy-hood-dampers.237831/).
Viper 5204V Alarm and Remote Start Install (2006-2011 Honda Civic) with DB-ALL2 Immobilizer Bypass
This guide covers installing a Viper 5204V security and remote-start system in a 2006-2011 (eighth-generation) Honda Civic, using an Xpresskit DB-ALL2 module to defeat the factory immobilizer and a data-to-data (D2D) link between the two units. Because the Civic uses a chip-coded key that the immobilizer verifies before the engine will crank, a remote starter cannot function on its own; the DB-ALL2 learns the key's transponder and presents that credential when the alarm calls for a start. Running the alarm and the bypass over D2D also collapses most of the discrete lock, unlock, status, and trigger wires into a single serial connection, so the analog wiring that remains is limited to a handful of circuits such as parking lights, horn, starter interrupt, and the rear defogger. Expect a demanding job: it involves cutting the factory starter wire, splicing into the immobilizer circuit, flashing firmware onto the bypass, and programming both the module and the alarm's option menus. Note that D2D also introduces a slight latency in lock/unlock response, since each command hops through the alarm and the bypass before the car reacts. Adapted from a community writeup by verbstyler on 8th Civic (https://www.8thcivic.com/threads/diy-alarm-and-remote-start-8th-civic.477177/), including corrections from the follow-up discussion.
8th-Generation Honda Civic HID Low-Beam Conversion
This guide covers converting the low beams of an 8th-generation Honda Civic (including the Civic Hybrid) from factory halogen to an aftermarket HID/Xenon kit. The low beams use a 9006 (HB-4) bulb and the high beams use a 9005, so a 9006 HID kit is a direct fit that needs no cutting or splicing. The result is a whiter, brighter beam that draws less power than stock: each ballast pulls roughly 35W against the 55W of the original halogen, and the bulbs actually run slightly cooler in the reflector housing. Color temperature options run from about 4300K (the factory halogen color) up toward 30000K; 6000K is a popular balance of white color and usable output, since anything much higher trades away brightness. The job is mostly mechanical access work through the wheel well plus a plug-and-play electrical connection, and it takes roughly two hours at a relaxed pace. Adapted from a community writeup by Orient Express on 8th Civic (https://www.8thcivic.com/threads/my-civics-hid-diy-installation.21376/), including corrections from the follow-up discussion.
DIY Carbon Fiber Coating for Trim and Cover Panels
This guide covers laying a decorative carbon fiber skin over an existing plastic or painted part, using cloth and epoxy resin rather than molded pre-preg. It is a cosmetic and skill-building process: you coat a stock piece so the woven finish shows through a clear resin surface, which is far cheaper than buying finished carbon parts. The gas-filler door is used as the worked example because it combines a curved surface, rounded edges, plus a fit that has to sit flush, so the method transfers directly to interior surrounds, engine-bay covers, and similar trim. It applies to the Acura RSX and, since the technique is not vehicle-specific, to nearly any removable plastic or painted panel on a Honda or Acura. Understand up front that a coated part is not a structural replacement panel; making load-bearing parts requires molds and a much larger investment. Adapted from a community writeup by RSXWOT on Club RSX (https://www.clubrsx.com/threads/diy-guide-official-carbon-fiber-coating-parts-and-more.351082/), including corrections from the follow-up discussion.
Acura RDX (1st Gen) Spark Plug Replacement and Top-Mount Intercooler Removal
The first-generation Acura RDX (2007-2012) uses a turbocharged 2.3-liter engine fitted with a top-mounted charge air cooler (intercooler) that sits directly over the cylinder head. Because that cooler blocks all access to the ignition system, replacing the four spark plugs first requires lifting the intercooler out of the way. This guide covers the complete job: detaching and removing the charge air cooler, swapping the factory NGK laser iridium plugs, and reassembling everything to the correct torque values. Honda schedules these plugs for roughly 100,000 miles, and owners who have opened the engine at that interval consistently report the originals still in serviceable shape, so the work is as much inspection as replacement. Two proven ways to release the cooler's bypass valve are described, since the community settled on the simpler one after the original writeup. Adapted from a community writeup by 737 Jock on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/diy-remove-charge-air-cooler-replace-spark-plugs-792921/), including corrections from the follow-up discussion.
Front Lowering Spring Install (Acura RSX / Honda Civic Si)
Front lowering springs drop the stance and firm up the ride of an 02-06 Acura RSX (DC5) or 02-05 Honda Civic Si (EP3) by replacing the factory coils on the original front dampers. Because the front strut sits in the middle of the steering knuckle and drive axle, this corner is more work than the rear and rates as an intermediate-level job; plan on roughly three to five hours for a first attempt. The parts that give people trouble are freeing the tie rod end without wrecking its boot, keeping the half-shaft seated in the transmission while the lower bolts are out, and relieving the coil from the damper without letting it launch. This guide covers the full front pair with common kits such as Tein S-Tech or Eibach Pro Kit, and incorporates fixes and shortcuts reported by others who ran the same procedure. Adapted from a community writeup by Ju5t Ep3 Pr4ct1c3 on Club RSX (https://www.clubrsx.com/threads/diy-front-lowering-spring-install.371890/), including corrections from the follow-up discussion.
First-Generation Acura TL D4 Gear-Indicator Bulb Replacement
The D4 gear-position indicator in the automatic-transmission display of the first-generation Acura TL (2.5TL and 3.2TL) is a small incandescent bulb that eventually burns out, leaving the drive-4 segment dark when the car is in gear. This guide covers replacing that bulb, which means removing the center dashboard trim and drawing the instrument cluster forward far enough to reach the staggered bank of position bulbs behind it. The genuine part is inexpensive (Acura part number 37103-ST7-003, typically under $5), and many owners instead relocate a bulb from a gear position they never select, since all the position bulbs are identical. Expect roughly a 30-minute job needing only a few screwdrivers, though the trim clips demand a gentle hand. Adapted from a community writeup by UnsanePyro on AcuraZine (https://acurazine.com/forums/1g-tl-problems-fixes-118/how-replace-d4-light-559179/), including corrections from the follow-up discussion.
Mugen Sport Suspension (Mugen SS) Install on the Acura RSX Type-S
The Mugen Sport Suspension (Mugen SS) is a bolt-in strut package for the Acura RSX Type-S, mechanically the same chassis as the Japanese Integra Type-R (DC5). Each corner arrives as one fully assembled unit combining a matched spring, damper, and mount, so no spring compressor is needed anywhere in the job. The kit lowers the car by roughly 35 mm (1.4 inch) and firms it up with higher rates, a stated front rate of 279 lbs/inch and a rear rate of 458 lbs/inch, up from the factory springs' 207 and 413. Because the dampers are non-adjustable, the work amounts to a like-for-like strut exchange front and rear, with the one delicate task being separation of the front tie-rod ends. Owners consistently note the ride stays close to stock in comfort while cornering composure improves sharply, and that alignment typically remains within factory range afterward. Plan for an afternoon and recruit a second person, since several steps need one worker underneath and one in the trunk or engine bay at once. Adapted from a community writeup by conradb212 on Club RSX (https://www.clubrsx.com/threads/mugen-ss-diy-and-data-long.132932/), including corrections from the follow-up discussion.
Curt Class III Trailer Hitch and Wiring Installation on the 2G Acura RDX
This guide covers bolting a Curt #13130 Class III receiver hitch and its matching #57008 harness to a second-generation Acura RDX (the 2017 Elite is the reference vehicle) and stowing the wiring inside the spare-tire well for a factory-clean result. It suits owners who need occasional towing capacity for a small utility trailer, a bike rack, or a cargo basket. Rated capacity on this platform is only about 1500 lb, so treat the hitch as a light-duty accessory rather than a heavy-hauling upgrade. Two details separate a smooth job from a frustrating one: the frame weld-nuts arrive coated in zinc and must be cleaned with a tap before any bolt will start, and the receiver's rear mounting points sit against a step in the frame rail that lets the tube push up into the bumper unless it is shimmed, exactly as Acura's own hitch does with factory spacers. The manufacturer's published torque figure also proved too aggressive in practice and is addressed below. Adapted from a community writeup by rubinox on AcuraZine (https://acurazine.com/forums/2g-rdx-diy-faq-406/trailer-hitch-led-lighting-dashcam-install-989797/), including corrections from the follow-up discussion.
Acura RDX (2nd Gen) Third-Gear Clutch Pressure Switch Replacement
A worn third-gear clutch pressure switch is a frequent trigger for intermittent harsh or jerky shifting on the second-generation Acura RDX (2013-2018) and other Honda/Acura models sharing the V6 6-speed automatic, such as the MDX, Odyssey, Ridgeline and Pilot. The fault is often maddeningly hard to reproduce: it may surface only once in a while, feel worst on a slow uphill pull around the 2-3 change, and clear after an engine restart or by selecting Sport mode. When it finally sets a stored fault, it usually logs code P0848, which points to this switch or its wiring. Replacing the switch is a straightforward job that requires no special programming and no transmission removal; most of the effort is simply clearing the battery, air intake and airbox out of the way to reach the top of the transmission case. The part is inexpensive (around $52 online versus a dealer quote near $360), making this a strong do-it-yourself repair. Note that a separate Acura software reflash (service bulletins B17-017/B17-018) addresses a different judder mode and is not required when the pressure switch is the actual cause. Adapted from a community writeup by tpaxadpom on AcuraZine (https://acurazine.com/forums/2g-rdx-diy-faq-406/acura-rdx-third-gear-clutch-pressure-switch-replacement-993904/), including corrections from the follow-up discussion.
Acura 3G TL Navigation Modding: Custom Splash Screen, Trip Computer, and OK-Button Nag Removal
This guide consolidates the three most common software modifications for the DVD-based navigation unit in the third-generation Acura TL: a custom boot/welcome image, an enabled trip computer, and removal of the OK-button acknowledgement (nag) screen. All three changes live inside a single firmware image on the disc, so they are applied together and then flashed into the head unit from a burned CD. It is written primarily for the orange v3.40c and v3.50 discs, with notes for the v3.30f/3.30G discs; owners of v3.60 and v3.7 discs will find that a few steps differ and should consult the version-specific threads. You should be comfortable working at a Windows command prompt before attempting this. The modifications are unofficial and carry a real risk of leaving the unit in a boot loop, but the factory firmware can always be reloaded from the diagnostic menu, and saved phone pairings, phone books, and radio presets are not affected. Adapted from a community writeup by kennyc on AcuraZine (https://acurazine.com/forums/3g-tl-audio-bluetooth-electronics-navigation-94/navigation-hack-guide-welcome-screen-mod-trip-computer-ok-button-nag-removal-604912/), including corrections from the follow-up discussion.
Third-Generation Acura Integra Coilover, Shock, and Spring Installation
This guide covers replacing the factory front and rear suspension on a third-generation Acura Integra (DC2/DB, 1994-2001) with an aftermarket coilover or spring-and-strut setup, using a 1995 Integra as the reference car. Swapping in coilovers lowers ride height, sharpens handling, and lets you dial in corner balance, but it is a demanding job: seized or corroded fasteners are common, and a loaded spring stores enough energy to cause serious injury if it releases uncontrolled. Expect the front corners to take the most effort and the rear to go quickly. Because every car's fasteners are in different condition, treat this as a general roadmap rather than a guarantee that your install will match step for step. Plan on an extra set of hands for the front assemblies. Adapted from a community writeup by MorningZ on Team Integra (https://www.team-integra.net/threads/g3-coilover-shocks-springs-install.342581/), including corrections from the follow-up discussion.
Honda Fit (GD): Build a JDM-Style LED Third Brake Light
This guide covers building a custom LED replacement for the center high-mount (third) brake light on the first-generation Honda Fit / Jazz (GD), reusing the factory housing and red lens. Instead of paying around ninety dollars for the JDM LED unit, you populate the original lamp with a small array of LEDs mounted on perfboard for the same look at a fraction of the cost. The stock incandescent bulb is removed and replaced by six 5mm LEDs wired through a current-limiting resistor so they survive the car's charging voltage. It applies to the GD-chassis Fit/Jazz hatch, and the same approach transfers to any lamp housing with a similar bulb socket. Expect basic soldering and a bit of trial fitting. Adapted from a community writeup by koolkevin1107 on FitFreak (https://www.fitfreak.net/forums/fit-interior-exterior-illumination/8530-jdm-style-3rd-brake-light-diy.html), including corrections from the follow-up discussion.
Honda Fit (GD) HVAC Control Panel LED Illumination Conversion
This guide converts the factory incandescent lighting in the climate-control panel of the first-generation Honda Fit (GD, L15A) to LEDs, letting you match the HVAC glow to the rest of your interior in any color you like. Four #74 wedge bulbs behind the temperature, fan, and mode controls are swapped for LED equivalents, the passenger-airbag and A/C-defrost switch icons are re-tinted to suit, and an optional pair of pre-wired LEDs can be added to throw usable light down into the cupholders, which the factory leaves almost dark. The job requires pulling the center trim, unbolting the radio, and extracting the whole HVAC assembly to a bench, so it is more involved than a simple bulb change. Because the LEDs are polarized and slightly larger than the originals, each is press-fit into its retained base and confirmed for correct orientation before final assembly. Adapted from a community writeup by billmus86 on FitFreak (https://www.fitfreak.net/forums/fit-interior-exterior-illumination/21220-led-hvac-diy-w-pics.html), including corrections from the follow-up discussion.
Honda Fit Front Strut Tower Bar Installation (A Spec / Tanabe)
A front strut tower brace links the tops of the two front strut towers to cut down on chassis flex during hard cornering. This guide covers fitting a bolt-on aluminum bar, such as the budget A Spec or Tanabe units (both made from 6061 T-6 alloy), to the first-generation Honda Fit (GD). It also folds in the hard lessons from the original build: the fasteners packaged with these kits are poor quality and rust within weeks, so the procedure replaces them with stainless hardware and isolates the steel mounting brackets from the painted towers to head off corrosion and paint abrasion. Note that the brackets clamp to the thin tower sheet metal rather than to the strut studs themselves, so temper your expectations: the practical result is a slight increase in front-end road noise and little felt change in handling, unlike a rear anti-sway bar. Adapted from a community writeup by manxman on FitFreak (https://www.fitfreak.net/forums/fit-suspension-brake-modifications/12295-spec-front-strut-bar-review-diy-install-w-photos.html), including corrections from the follow-up discussion.
Acura CL (1G) Climate Control LED Illumination Conversion
This guide converts the climate control panel illumination in the first-generation Acura CL from its factory incandescent bulbs to LEDs, so the button lighting can be matched to an LED gauge cluster or a chosen interior color. Two levels are covered: a straightforward direct bulb swap using drop-in LED replacements, and an optional advanced stage that adds extra wired LEDs to drive light fully down the panel's internal channels so the MODE and Manual labels glow evenly. The drop-in bulbs carry their own resistors, so no resistor soldering is required for the basic swap; the second stage does involve soldering and patient wire routing inside a very tight housing. Either way, the wood trim and the climate control unit must first be removed to reach the circuit board, and the LED bulbs are polarized, so orientation must be tested before final assembly. Adapted from a community writeup by 97BlackAckCL on AcuraZine (https://acurazine.com/forums/1g-cl-diy-faq-74/climate-control-led-swap-diy-modification-696786/), including corrections from the follow-up discussion.
Honda S2000 EVAP System Delete with Fuel-Tank Vent Valve
The evaporative emissions (EVAP) system captures fuel vapor from the tank and routes it back into the intake to be burned rather than vented. On an S2000 that has moved to a standalone ECU, the ECU no longer commands the EVAP solenoids, so the system sits dead. Left in place and inoperative, the charcoal canister and its hoses gradually saturate with fuel, producing a persistent fuel smell, occasional leaks, and enough back-pressure at the filler neck to trip the pump nozzle while refueling. This guide covers a full, clean removal of the canister, solenoids, brackets, and hoses, plus the one detail that makes the delete work correctly: the tank must still be able to breathe. Capping every line outright creates alternating vacuum and pressure that strains the fuel pump, so the delete fits a two-way pressure-relief check valve (the Newton TPV8) on the tank vent. The valve holds a slight positive tank pressure and vents only the excess, so the tank breathes without filling a closed garage with fuel vapor. It applies to the Honda S2000 (AP1 and AP2); the rear layout differs slightly between early and late cars. A reversible bypass version is included for owners who must return to stock for emissions testing. Adapted from a community writeup by Kyle on S2KI (https://www.s2ki.com/forums/s2000-forced-induction-142/diy-evap-system-removal-proper-way-1207469/), including corrections from the follow-up discussion.
Honda Fit L15A7 Valve Clearance Check and Adjustment (2nd-Gen GE8)
This guide covers checking and, where needed, adjusting the valve clearances (valve lash) on the Honda L15A7 1.5-liter four-cylinder used in the second-generation Fit (GE8, roughly 2009-2013, sold as the Jazz in some markets). The L15A7 runs a solid-lifter, screw-and-locknut valvetrain with no hydraulic self-adjustment, so the lash slowly drifts over tens of thousands of miles and must be measured and reset by hand. Honda treats this as a periodic service; owners who let it go commonly find the exhaust valves have tightened below specification, which shows up as a rough idle, dulled throttle response, and, over the long term, accelerated valve and ignition-coil wear. The measurement must be taken with a fully cold engine, and reaching the cam area on this car requires stripping off a fair amount of intake and cowl hardware. Budget two to three hours the first time. Note that a valve adjustment on its own does not always resolve an idle stutter or misfire - several owners here ultimately traced those symptoms to spark plugs or ignition coils - so treat this as one part of a broader tune-up rather than a guaranteed cure. Adapted from a community writeup by mhadden on FitFreak (https://www.fitfreak.net/forums/2nd-generation-ge8-specific-diy-repair-maintenance-sub-forum/75306-diy-valve-clearance-check.html), including corrections from the follow-up discussion.
Honda Civic (FN3) Rear Brake Disc and Pad Replacement - EBC GD Grooved Discs and Yellow Stuff Pads
This guide covers renewing the rear brake discs and pads on the eighth-generation Honda Civic (FN3, 2.2 i-CTDi, Type S), upgrading from the factory setup to EBC GD grooved discs and EBC Yellow Stuff pads. It is a worthwhile job if the rear brakes feel vague or uneven, if the discs are worn to their lip (roughly 1mm of wear per side, 2mm combined, is the usual limit), or if you simply want stronger, cleaner-running rear brakes. In this case the original pads were only about 50% worn at 23000 miles yet the braking was erratic, one rear pad had seized in its carrier, and a rear piston was found full of air rather than fluid, so the system was also flushed and refilled with DOT 5.1 fluid. Expect a full day's work if you clean and prepare the parts properly. The part codes on the boxes are specific to the 2.2 FN3, so confirm the correct references for your variant before ordering. Adapted from a community writeup by Relic on Civinfo (https://www.civinfo.com/threads/fitting-my-rear-ebc-grooved-disks-and-yellow-stuff-pads.38259/), including corrections from the follow-up discussion.
Fitting Aftermarket Rear Parking Sensors to a Honda Civic Hatchback
This guide covers retrofitting an aftermarket ultrasonic rear parking sensor kit to the 8th-generation Honda Civic hatchback (FN/FK), and applies to both the three-door and five-door bodies. It walks through removing the rear bumper, drilling and mounting the sensors, tapping into the reverse-light circuit for a switched 12 V supply, and routing the wiring back to a control box and buzzer inside the boot. Fitting sensors makes reversing in poor visibility far safer and matches the factory option on cars that were never specified with it. The three-door is the harder body to wire because reaching the reverse feed means stripping the full length of interior side trim; the five-door is easier since that trim stops at the rear passenger door. Budget most of a day and work patiently, as rushing the trim clips and bumper removal is what breaks parts. Adapted from a community writeup by Syx on Civinfo (https://www.civinfo.com/threads/how-to-install-after-market-parking-sensors-3-door.70248/), including corrections from the follow-up discussion.
Honda Civic MK9 i-DTEC Leaking Oil Cooler Plate Replacement
This guide covers diagnosing and replacing the oil cooler plate on the ninth-generation (MK9/FK) Honda Civic fitted with the 1.6 i-DTEC diesel; the same leak and procedure also affect the 1.5 i-DTEC. On these engines the plate's engine-side gaskets eventually fail and weep oil, which then spreads across the front-left of the block, the underside, the rear of the front subframe and the undertray, often masked by road spray until oil consumption becomes obvious. Because the plate sits deep behind the DPF, turbo and EGR plumbing, reaching it means stripping a large part of the engine's front end, so the job rewards patience and good documentation more than raw mechanical skill. Doing it yourself replaces a dealer quote of around 3,599 pounds (locals quoted about 2,000 pounds) with roughly 300 pounds in parts. Adapted from a community writeup by McGoo on Civinfo (https://www.civinfo.com/threads/honda-civic-mk9-1-6-i-dtec-leaking-oil-cooler-plate-replacement-guide-v0-1.436316/), including corrections from the follow-up discussion.
Building a Custom Sealed Airbox and Cold-Air Duct for a Short Ram Intake (Honda Accord Euro CL9)
This guide covers fabricating a sealed sheet-metal airbox (heat shield) around an exposed short ram intake (SRI) pod filter on a Honda Accord Euro (CL9, sold in North America as the Acura TSX), then ducting cool air to it from behind the front bumper. Enclosing the pod serves two purposes: it isolates the filter from hot underbonnet air so intake temperatures stay closer to ambient, and it hides the open element, which in some jurisdictions helps avoid an exposed-pod compliance defect. Compared with a full cold-air intake, a shielded SRI keeps the intake tract short and preserves low-RPM response while approximating the behaviour of an expensive commercial enclosure at a fraction of the cost (roughly AUD 100 in materials and basic tools). The build suits any owner comfortable with measuring, cutting and riveting thin aluminium, and can be adapted to other pod shapes since the Apexi unit used here has a wide, short body. Recorded results: with an ambient temperature of 16 C, intake air temperature settled at 38 C after five minutes at idle and dropped to 24 C at 80 km/h, and coolant temperature fell by about 2 C while cruising once the duct was fitted. Adapted from a community writeup by aaronng on OzHonda (https://ozhonda.com/forum/showthread.php?53595-DIY-Ghetto-dodgy-custom-airbox-for-SRI-(Accord-Euro)-Temperature-on-page-5!), including corrections from the follow-up discussion.
K20A2 Swap into a 1996-2000 Honda Civic (EK): Mounts, Manual Conversion, Cooling and Axles
This guide covers a complete K20A2 K-series engine swap into a 1996-2000 Honda Civic (EK), using HaSport EKK1 mounts and drawing donor parts from an Acura RSX Type-S. It walks through the full scope of the job: converting an automatic EK to a manual pedal and clutch hydraulic setup, bolting in the EKK1 mount plates to factory holes, fitting a Karcepts shifter kit so RSX cables and the shifter box sit like OEM, relocating the radiator and A/C condenser brackets, lowering the engine in, sorting the correct axle combination, and plumbing the fuel and clutch lines. It applies to EK Civics; EG chassis owners should note the mounting hardware and drilling differ. Because the EKK1 mounts pull the engine forward, cooling-fan clearance and axle length both require specific solutions detailed below. Attempt this only with fabrication access (drilling, cutting, and ideally welding) and confirm all electrical and emissions compliance for your region before driving. Adapted from a community writeup by boost_me on K20A.org (https://www.k20a.org/threads/k20a2-ek-swap-parts-list-pictures-manual-conversion-and-writeup-in-progress.7176/), including corrections from the follow-up discussion.
Two-Stage Dry Nitrous Install and KPro Wiring for a K-Series Honda
This guide covers building a two-stage dry nitrous system for a K-series Honda — here a K20A2-swapped EG Civic — and controlling it through a Hondata KPro ECU. Stage one is a single-fogger nozzle in the intake pipe fed by a 10 lb bottle; stage two is a four-cylinder direct-port arrangement fed by a 15 lb bottle. The two stages fire one after the other rather than together, which shortens the time each bottle is under load and limits the pressure drop that makes a single large shot inconsistent late in a run. Both stages are dry, so the extra fuel is added through the port injectors under ECU control instead of through the nitrous lines. The build walks through machining the manifold for the direct port, plumbing the supply, wiring the solenoids and bottle warmers through relays, configuring KPro activation, and — importantly — what dyno testing revealed about jetting, bottle pressure, and why a passive pressure regulator was ultimately removed. It is aimed at experienced tuners: nitrous is unforgiving of wiring mistakes, lean conditions, and inconsistent delivery. Adapted from a community writeup by Moseley on K20A.org (https://www.k20a.org/threads/2-stage-dry-nitrous-setup-installation-wiring-kpro-etc.92898/), including corrections from the follow-up discussion.
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Honda CR-Z (EX) Polk Speaker and Subwoofer Upgrade
This guide covers a full speaker upgrade for the Honda CR-Z EX, replacing the six factory speakers with Polk components up front and coaxials in the rear, and improving the factory subwoofer with a polyester-fill modification. The EX's 340-watt amplifier is capable, so the real weak point is the OEM speaker cones; swapping them delivers a dramatic gain in clarity and output for modest cost. The work spans sound-deadening the doors, mounting the front component woofers and dash tweeters, fitting the rear coaxials, and stuffing the sub enclosure. It suits an owner comfortable with interior trim removal and basic soldering. This procedure is specific to the EX audio system: the base model uses a different head unit and amplifier and may respond differently to aftermarket speakers. Adapted from a community writeup by Cheule on CRZ Forum (https://www.crzforum.com/threads/diy-ex-model-7-speaker-polk-upgrade.10709/), including corrections from the follow-up discussion.
Honda Prelude JDM Digital Climate Control (DCC) Conversion
This guide covers retrofitting the Japanese-market digital climate control (DCC) system into a Honda Prelude originally fitted with the manual push-button and slider climate controls. The DCC replaces that manual head with a slim smoked-glass panel of soft-touch buttons and a single physical switch for the rear demister, and it automates the cabin climate using six inputs: cabin temperature, heater-core temperature, evaporator air temperature, outside temperature, vehicle speed and direct sunlight. From these it manages the air conditioning, the heater water valve, the air blend, the fan speed and the vent modes. Because the DCC controller cannot run on its own, you must gather the full parts set (all sensors, the air-mix motor, power transistor and blower high relay) before starting; expect to pay roughly $150-$450 for a complete set. This is a major job that involves recovering the A/C refrigerant, draining the coolant, re-soldering the wiring harness, and removing the dash, evaporator and heater unit, so the car will be off the road for several days. Right-hand-drive installations need extra fabrication because the air-mix motor has no factory mounting point and drives the blend door in the wrong direction if fitted in the original spot. Adapted from a community writeup by Street_Lude on PreludePower (https://www.preludepower.com/threads/jdm-digital-climate-control-write-up.409497/), including corrections from the follow-up discussion.
Nexus 7 Tablet Head Unit Install with Factory Amp and Steering Wheel Control (2006-2011 Honda Civic)
This guide replaces the factory double-DIN head unit in a 2006-2011 Honda Civic with a Nexus 7 2013 tablet running as a fully integrated infotainment system, while keeping the factory premium amplifier and the OEM steering wheel controls working. It suits owners whose stock unit has failed (the display backlight is a known weak point) and who want a customizable Android interface for navigation, streaming, and music rather than an expensive aftermarket navigation deck. The tablet feeds line-level audio to the factory amp through a USB DAC, powers up and sleeps with the ignition, and reads the resistive wheel buttons through a JoyCon EXR interface that converts them to USB keystrokes. There is no off-the-shelf kit, so expect Android rooting, soldering, factory-harness pin work, PC-side control mapping, and some trial-and-error on grounding and noise. On non-premium trims without a factory amp (for example the LX), you will need an amplified aftermarket deck or a separate amplifier to drive the speakers. Adapted from a community writeup by lamlux on 8th Civic (https://www.8thcivic.com/threads/diy-nexus-7-2013-head-unit-integration-with-factory-audio-and-steering-wheel-control.538330/), including corrections from the follow-up discussion.
Honda Civic (8th Gen) Starter Motor Replacement (Automatic Transmission)
This guide covers replacing the starter motor on the eighth-generation Honda Civic with an automatic transmission, spanning roughly the 2006-2011 model years. The starter sits low on the transmission side of the engine in a cramped pocket reached from beneath the passenger-side wheel well, so much of the work is done blind, by feel. Typical failure signs are progressively harder starting that ends in no cranking at all: the dashboard powers up, the fuel-pump relay buzzes in the cabin fuse box, and the starter solenoid clicks, yet the engine will not turn over. The battery tests good and no diagnostic trouble codes are stored. Mechanically the job is only a handful of bolts and harness clips, but the tight access makes it far more involved than the fastener count suggests; budget most of a day and expect trial and error. Doing it yourself avoids a dealer charge in the range of $740-$800. Adapted from a community writeup by epic2015 on 8th Civic (https://www.8thcivic.com/threads/diy-starter-replacement.655019/), including corrections from the follow-up discussion.
Honda Civic Big Three Charging and Grounding Cable Upgrade
The Big Three upgrade adds three heavy-gauge cables to a vehicle's charging and grounding system to cut electrical resistance between the alternator, battery, and chassis. Lowering that resistance limits voltage drop and heat, steadies the electrical system under heavy loads such as high-power car audio, and can noticeably brighten the headlights. The name refers to the three connections involved: a positive cable from the alternator output to the battery positive, a ground cable from the battery negative to the engine block, and a ground jumper tying the chassis into that same circuit. The factory already provides these paths, but with thin wire that cannot carry the extra current large accessories demand, which is why voltage sags and components heat up. This guide applies to the 8th-generation Honda Civic, including the Si, and the same method transfers to most other vehicles. Adapted from a community writeup by HsOffRoad on 8th Civic (https://www.8thcivic.com/threads/diy-taking-the-mystery-out-of-the-big-three.131414/), including corrections from the follow-up discussion.
Acura RDX Automatic Transmission Fluid Flush by Triple Drain-and-Fill
This guide covers refreshing the automatic transmission fluid in the first-generation Acura RDX (2.3L K23A1 i-VTEC) using three successive drain-and-fill cycles rather than a single change. A conventional drain empties only the transmission sump; the torque converter retains most of the roughly 7.8 L total, so one change swaps out under half the fluid. Repeating the drain and fill three times, with a short drive between each to blend the fluid, progressively dilutes the old fluid and approaches a full flush without a pressurized flushing machine, which Honda advises against. The payoff is smoother, more responsive shifting from clean fluid; a sensible interval is around every 30,000 miles. Honda originally specified ATF-Z1 and later superseded it with the synthetic DW-1; the two are compatible and may be mixed, and DW-1 is now the current fluid. Both front-wheel-drive and all-wheel-drive RDX models are covered, with a note where the procedure differs. Adapted from a community writeup by 737 Jock on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/diy-transmission-fluid-flush-3x-drain-fill-794451/), including corrections from the follow-up discussion.
Acura RDX (1st Gen) Rear Damper Replacement
The first-generation Acura RDX (2007-2012) is prone to rear dampers that wear out early, weeping hydraulic fluid past the plastic dust shroud and producing a clunk over sharp bumps. This guide covers removing a worn or leaking rear shock absorber and fitting the current OEM replacement, part# 52610-STK-A03, which supersedes the earlier -A02; the same unit is used on either side of the vehicle. Because no alignment-adjustment fasteners are disturbed, a wheel alignment is not required afterward. Throughout these instructions, left and right refer to the driver and passenger sides of the car itself, regardless of which way you happen to be facing. Adapted from a community writeup by 737 Jock on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/diy-replace-leaking-rear-damper-shock-absorber-794969/), including corrections from the follow-up discussion.
Acura RDX Automatic Transmission Fluid Change and Accurate Level Reading
This guide covers reading the automatic transmission fluid level accurately and performing a drain-and-fill on the first-generation, turbocharged Acura RDX (2007-2012). The RDX transaxle is refilled through an awkward top-mounted fill bolt and checked with a dipstick whose usable span is only a few millimetres, so getting a repeatable reading is the real challenge. You would do this to renew the fluid on schedule, to flush out break-in and clutch wear particles that the saturated internal magnet can no longer hold, or simply to confirm the level after service. The central idea is that a hot reading is a single-shot measurement that drifts as the transmission sits, while a cold reading taken after the car has rested overnight repeats reliably; once you know the fixed offset between the two you can verify the level any time from a cold check. Adapted from a community writeup by dcmodels on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/transmission-oil-level-reading-oil-change-comments-801122/), including corrections from the follow-up discussion.
Adding an Inline Magnetic Transmission Filter to the Acura RDX
An inline magnetic transmission filter adds serviceable, external filtration to the first-generation Acura RDX (2007-2012), whose five-speed automatic carries only an internal filter and magnet that cannot be reached without splitting the transmission case. By splicing an aftermarket MagneFine filter into the transmission cooler line, you capture the steel, copper, aluminium and clutch particles that ordinary wear sheds, debris that would otherwise keep circulating and foul the solenoids, valves and fluid passages behind most automatic failures. A magnetic drain plug only holds particles that settle in the pan and saturates quickly, and any single drain exchanges just part of the total fluid, so this add-on is meant to work alongside frequent drain-and-fill services to stretch transmission life well past the factory maintenance schedule. The same method transfers to other Honda and Acura models that route fluid through an external cooler line, such as the fourth-generation TL. Adapted from a community writeup by dcmodels on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/diy-%96-add-transmission-replaceable-inline-magnetic-filter-803129/), including corrections from the follow-up discussion.
Adding an Inline Magnetic Power Steering Filter (Acura RDX)
This guide covers fitting an aftermarket inline magnetic filter into the power steering circuit of a 2007-2012 (first-generation) Acura RDX to extend the service life of the pump and steering rack, with a realistic target of roughly 250K miles (400K km) under hard, short-trip city use. The factory RDX system relies on nothing more than a coarse plastic mesh screen in the reservoir and contains no magnet, so it cannot capture the fine metallic wear particles that circulate at up to 1,300 psi and abrade the pump and rack seals. An inline magnetic filter traps both the steel swarf and the larger non-metallic debris; because the smallest non-magnetic particles still slip through, the procedure is paired with regular fluid changes. The same filter and technique transfer readily to other Acura and Honda power steering systems, which share pump and hose design. Read the whole procedure before starting, because orientation and clearance mistakes can be costly. Adapted from a community writeup by dcmodels on AcuraZine (https://acurazine.com/forums/1g-rdx-diy-faq-161/diy-%96-add-power-steering-replaceable-inline-magnetic-filter-828859/), including corrections from the follow-up discussion.
Integra RS/GS/LS/GSR Front Big-Brake Upgrade Using Type R Calipers and Mini Cooper Rotors
This guide covers a low-cost front big-brake conversion for the 1994-2001 Acura Integra in RS, GS, LS, and GSR trim, and it also applies to the earlier second-generation chassis because both share the same front caliper and hub. The build mates inexpensive five-lug reman calipers from the Type R / V6 Accord family with an off-the-shelf 280mm rotor from a 2007 base Mini Cooper (not the S), taking front rotor diameter from roughly 10.3 in to about 11 in while keeping factory piston size and therefore factory pedal effort. The larger disc adds heat capacity for repeated high-speed stops, autocross, and track sessions, where the smaller original rotors fade. Earlier versions of this swap used a Prelude rotor that had to be redrilled or machined; the Mini rotor is the key correction, because its center bore matches the Honda hub and it centers with no machining at all. The only fabrication is a small relief cut in the splash shield to clear the taller caliper. Adapted from a community writeup by LightningTeg on Team Integra (https://www.team-integra.net/threads/diy-the-no-bs-bolt-on-big-brakes-for-rs-gs-ls-gsr.209631/), including corrections from the follow-up discussion.
Acura RDX (3G) Apple CarPlay USB Port Relocation
On the third-generation Acura RDX the only Apple CarPlay USB socket is buried inside the storage bin at the base of the center console, which is awkward for a permanently connected phone cable. This guide walks through relocating that port cable to a more accessible spot beneath the tunnel. There is no shortcut: reaching the back of the socket requires stripping most of the center console and its surrounding dash trim, because each panel traps the next. No wiring needs to be cut for the relocation itself, though you may choose to drill a discreet cable exit at the end. Set aside a large block of time, keep every fastener sorted by where it came from, and treat the clips patiently, since several of the panels are thin and crack easily. This procedure suits the 2019-onward RDX with factory CarPlay. Adapted from a community writeup by SarcasticaLy on AcuraZine (https://acurazine.com/forums/3g-rdx-diy-faq-460/diy-carplay-usb-port-relocation-1001847/), including corrections from the follow-up discussion.
Honda Fit HID Projector Retrofit Using Infiniti FX35 Bi-Xenon Projectors
This guide covers building projector HID headlights for the Honda Fit by transplanting Infiniti FX35 bi-xenon projectors into the factory reflector bowls, then hiding the projector behind an improvised shroud made from an inexpensive stainless steel pet bowl. The FX35 projector is chosen because it retains a high-beam function via its bi-xenon solenoid, produces a sharp cutoff, and is more affordable than many alternatives. The result is a clean, glare-controlled beam with an OEM-style appearance that suits the compact Fit headlight housing better than larger shrouds. The work applies to the first- and second-generation Fit (GD and GE), and the same approach adapts to other reflector housings. Expect permanent cutting of the reflector bowls, some light fabrication, and wiring of a bi-xenon harness, so it is best suited to builders comfortable with a dremel and basic 12V wiring. Adapted from a community writeup by smeister on FitFreak (https://www.fitfreak.net/forums/fit-interior-exterior-illumination/18061-diy-hid-retrofit-fx35-projectors.html), including corrections from the follow-up discussion.
Honda Fit (GD) Rear Drum-to-Disc Brake Conversion
This guide converts the rear drum brakes on a first-generation Honda Fit (GD) to a discreet, OEM-style disc setup using rear brake components from a 1997 Acura Integra (non-Type R). The aim is a factory-appearing result that retains the standard rotor diameter and preserves the car's front-to-rear brake proportioning, rather than an oversized big-brake kit, and it costs far less than the pre-packaged kits sold for the platform (roughly $540 in parts). A Scarebird adapter bracket locates the Integra caliper and rotor on the Fit's rear axle; the disc and caliper installation is straightforward, while adapting the parking brake is the time-consuming part and requires 1987 Acura Legend cables plus some fitting. ABS remains fully functional after the swap and no master-cylinder change is needed. Note that for hard track use some owners report the stock proportioning valve can let the lighter rear discs lock, so evaluate braking balance before pushing the car. Adapted from a community writeup by apexanimal on FitFreak (https://www.fitfreak.net/forums/fit-suspension-brake-modifications/87423-diy-gd-rear-disc-brake-conversion.html), including corrections from the follow-up discussion.
Honda Fit (GE8) DIY Short-Ram / Cold-Air Intake Using the Factory MAF Tube
This guide builds a custom short-ram (or cold-air) intake for the 2nd-generation Honda Fit (GE8, MAF-equipped models) for roughly the cost of a filter and a few couplers, instead of buying a $250-$300 bolt-on kit. The trick is to salvage the mass-airflow (MAF) tube out of the factory airbox lid and rebuild the intake tract around it, so the MAF sensor keeps measuring air in its original housing and diameter. That preserves correct fuel metering and avoids a persistent lean code, which is exactly where the cheap universal intakes fail. The result is a deeper intake note under load, a slight response gain, and a fully reversible setup if you keep a spare factory lid. It applies to GE8 Fits that use a MAF sensor; the non-MAF Sport variants can run a universal intake without any cutting. Adapted from a community writeup by Lyon[Nightroad] on FitFreak (https://www.fitfreak.net/forums/2nd-gen-ge8-specific-fit-engine-modifications-motor-swaps-ecu-tuning-sub-forum/55146-diy-50-less-intake-ge-cai-sri.html), including corrections from the follow-up discussion.
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