K20A engine and transmission

Engine K-series swap Verified Modification Required

Compatibility Overview

Source Vehicle

K-series (K20A)

Target Vehicle

Civic (EG) / Integra (DC)

Generation: EG / DC chassis

Installation Difficulty

Easy Basic tools
Moderate Some experience
Difficult Skilled work
Expert Professional

Reference

K20A specs → D14A1 specs → K20Z4 specs → LEB-H5 specs → K20Z2 specs → B18A1 specs → K20Z3 specs → K20A3 specs → D16A6 specs → K20Z1 specs → K20A2 specs → D16W4 specs → EA specs → EC specs → ED specs → EG specs → EM specs → EN specs → EP specs → ER specs → ES specs → ET specs → EW specs → K20A1 specs → K20A4 specs → K20A6 specs → K20A7 specs → K20A9 specs → K20B specs → K20Z5 specs → PPL Cylinder Head → PHA ECU → RNE ECU → PPL ECU → PPL →
The K20A does not bolt to the factory B/D mounting points and requires a dedicated conversion mount kit. The kit provides a rear mount bracket that fastens to the subframe, a timing-chain-side mounting arrangement (small and large mounts) that reuses the passenger-side tow-hook location, and a driver-side transmission bracket. Supplied 1/2 inch spacers set the transmission bracket standoff on the rear crossmember side and take up the differing bolt-point heights on the driver-side bracket. The factory engine-harness plugs are pushed through the firewall and retained under the dash for later wiring rather than being cut. This entry covers Part 1 (mechanical fitment and mounting) only; wiring, cooling, and axle integration are separate phases.
The chassis must be cut to accept the K-series driveline. The factory transmission bracket is removed with a reciprocating saw or a 5 inch die grinder, and the condenser brackets on the lower subframe are also cut off. The radiator is relocated into the area the condenser brackets occupied. The engine itself is stripped of its power-steering pump, air-conditioning compressor, and unneeded factory brackets to clear the bay.

Important Caveats

  • • Requires cutting structural-adjacent chassis brackets and relocating the radiator; verify local roadworthiness/engineering-certification requirements for engine conversions before road use.
  • • On the driver-side transmission bracket, use both spacers only in the two holes closest together; the far hole bolts directly to the transmission with no spacer, or the mount will bind.
  • • Leave all mounts finger-tight and cross-tighten only after full alignment to avoid preloading the driveline.

DIY Installation Guide

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Community Verification

1
user verified this swap
By K20EG via K20A.org
Added 1 day ago

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Sources & References

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