With over ten years of K-Series swap wiring experience, the Hybrid Racing Conversion Harness is the most widely used and reliable K-Swap conversion harness on the market. This conversion harnesses powers thousands of K-Swaps all over the world!
The K-Swap harness interfaces with your factory dash harness, your OEM K-Series engine harness, and your K-Series ECU allowing for a simple plug-and-play K-Swap.
The Hybrid Racing Conversion Harness allows for full functionality of the factory gauge cluster and comes with a full replacement warranty. Other companies will have you send in parts of your stock harness, wasting time and money in shipping. The Hybrid Racing Conversion Harnesses are in stock and ready to ship. You do not have to send us a core; they are available for overnight shipment.
What engine harness does the Hybrid Racing conversion harness work with?

This harness works with all USDM / JDM 02-04 wiring harnesses including K20A, K20A2, K20A3.
This harness is wired to use the factory wideband O2 sensor, so European customers using the UKDM K20A/K20A2 wiring harness will need to convert the harness to use the narrowband type sensor.
This harness does NOT work with any 05-06 OR K24 engine WIRING harnesses and ECU.
This harness is NOT compatible with some European market 92-95 Civics equipped with a carburetor. 

What type of connectors and pins do you use?
When we construct a Hybrid Racing harness, we utilize brand new connectors, terminals, and wire sourced from the same company that Honda utilizes for their connectors. These connectors are ordered in bulk from Japan and ensure you get all new parts. In addition, all new connectors decrease the chance of errors in the harness as we do not solder any of the joints. Every harness is machine-made, and human checked, so they are issue-free.
What if I have questions or problems?
To ensure a trouble-free install, all wires are labeled and neatly packaged. Full tech support is the most valuable thing you get when purchasing a Hybrid Racing harness. This tech support extends beyond your harness and includes help with anything associated with your swap. If you have any problems with the swap, call us, and a tech will get you the necessary information. It’s like having a buddy down the street who has already done hundreds of K swaps!