H22A engine and manual transmission (H-swap)
into Civic CRX (from Prelude VTEC)

BB1 Prelude VTEC 1993-1996
→
EF Civic CRX 1988-1991

Yes: the H22A engine and manual transmission (H-swap) from the Prelude VTEC (1993-1996) fits the Civic CRX (1988-1991) — difficult difficulty, modifications required.

Verdict
Fits.
Verified entry · modifications required
Verified ✓
Difficulty
Difficult
Mods
Required
Category
Engine

Installation notes

Yes — the H22A engine and manual transmission from a 1993–1996 Honda Prelude VTEC (BB1) fits a 1988–1991 Honda Civic or CRX (EF) with a weld-in H-series mount kit, H-swap axles and a cable-to-hydraulic clutch solution. Innovative Mounts sells a conversion kit for the ED/EE/EF Civic and CRX that needs the passenger-side chassis mount welded in and a Prelude/Accord rear T-bracket. Hasport sells HP-EFHAX chromoly axles for the H-series swap into the 88–91 Civic/CRX, and Insane Shafts lists H22/H23 swap axles for EF Civics and CRXs.
ModsMods req.

Required modifications

Engine mounts: Innovative Mounts 88-91 Civic/CRX H/F-series conversion kit (available with or without a clutch actuator). Innovative says the stock passenger-side mount must be removed and a new passenger-side chassis mount welded in, and that a 90-93 Accord / 92-96 Prelude DX/LX-type rear T-bracket is required. Axles: Hasport HP-EFHAX (chromoly axle set for the H-series swap into 88-91 Civic/CRX, used with the hydro manual intermediate shaft) or Insane Shafts H22/H23 swap axles listed for EF Civic and CRX. EF cars have a cable clutch, so the hydraulic H-series gearbox needs the actuator or a hydraulic conversion. Also needs a shifter setup and ECU/harness.

Caution

Important caveats

  • The Innovative kit is weld-on: the stock passenger-side chassis mount is removed and a new one welded in.
  • A rear T-bracket from a 90-93 Accord or 92-96 Prelude (Innovative part 59630) is required.
  • Hasport rates HP-EFHAX for street use, not drag racing.
  • The EF is a light, short-wheelbase car; the H22 adds significant front weight, so brakes and suspension deserve attention.

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Reference

H22A specs → D14A1 specs → LEB-H5 specs → B18A1 specs → K24A8 specs → K24A4 specs → D16A6 specs → B18B1 specs → H22A4 specs → H23A specs → H23A1 specs → B18C2 specs → B18C7 specs → D16A8 specs → D16W4 specs → EA specs → EC specs → ED specs → EE specs → EF specs → EL specs → EN specs → ER specs → ES specs → ET specs → H22A1 specs → H22A2 specs → H22A3 specs → H22A5 specs → H22A7 specs → H22A8 specs → H23A2 specs → H23A3 specs → PDE-1 Cylinder Head →

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Sources

3 refs
  1. 01 https://innovativemounts.com/products/88-91-civic-crx-conversion-mount-kit-h-f-series-manual
  2. 02 https://hasportperformance.com/products/hp-efhax/
  3. 03 https://hybrid-racing.com/products/insane-shafts-h-series-engine-swap-axles-88-00-civic-90-01-integra
Submitted by FitMyBuild research Added Updated

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