Connect Your K-Series Engine Harness to Your Chassis the Right Way
Installing a K20 or K24 into an older Honda or Acura chassis doesn't have to mean cutting, splicing, and trying to figure out complicated wiring diagrams.
This K-Series Chassis Adapter Harness is designed to connect a compatible 2002–2004 K20 engine harness to your vehicle's interior/chassis harness while also adding the required ECU E-plug and its associated functions.
It's an ideal solution for K-swaps using 2002–2004 K-Pro and compatible Rywire K-Series engine harnesses.
Designed for 2002–2004 K-Pro Applications
This chassis adapter was built primarily around the popular 2002–2004 K-Series ECU/K-Pro configuration.
Instead of modifying your engine harness to make it work with an older chassis, the adapter provides the necessary interface between the K-Series engine electronics and the vehicle.
Compatible Engine Harnesses
Designed for use with:
2002–2004 K20 engine harnesses
Compatible OEM K-Series engine harnesses
Rywire K-Series engine harnesses
Rywire K1
Rywire K2
Compatible 2002–2004 K-Pro ECU configurations
Adds the ECU E-Plug
A major part of converting a K-Series engine into an older Honda chassis is properly handling the ECU's additional chassis-side connections.
This adapter adds the E-plug and its required wiring, providing the interface needed for the K-Pro ECU and chassis to work together.
That means less custom wiring and a much cleaner installation.
This allows the K-Series engine management system to integrate with the chassis while retaining the applicable factory functions supported by your specific vehicle and swap configuration.
Perfect for K20 & K24 Swaps
This harness is an excellent solution for:
K20 swaps
K24 swaps
K20/K24 combinations
Honda Civic K-swaps
Acura Integra K-swaps
Naturally aspirated builds
Turbo K-Series builds
Street cars
Drag cars
Track builds
Why Use a Chassis Adapter?
You can wire a K-swap manually—but that means identifying circuits, cutting wires, making splices, and troubleshooting every connection if something doesn't work.
A purpose-built chassis adapter helps eliminate that unnecessary work.
Key Benefits
Connects a compatible K-Series engine harness to the chassis harness
Designed around 2002–2004 K20 electronics
Primarily intended for 2002–2004 K-Pro
Compatible with applicable Rywire K-Series harnesses
Supports Rywire K1 & K2 configurations
Adds the required ECU E-plug
Reduces custom wiring
Cleaner installation
Fewer unnecessary splices
Great for K20 and K24 swaps
Ideal for street and race builds
Spend Less Time Wiring and More Time Finishing Your K-Swap
A K-swap has enough moving pieces already.
The K-Series K-Pro Chassis Adapter Harness simplifies one of the most confusing parts of the conversion by providing the connection between your 02–04-style K-Series engine harness, K-Pro ECU, and chassis wiring.
Plug it in. Finish the installation. Get your K-swap running.
Important Fitment Note
K-Series swaps can use many different combinations of engines, ECUs, engine harnesses, transmissions, and chassis wiring. This adapter is primarily designed around 2002–2004 K-Pro applications using a compatible 02–04 K20-style or Rywire K-Series engine harness. Verify your exact chassis, ECU, and engine-harness configuration before ordering.
