1988-1991 Honda Civic and CRX w/ K-Swap Hybrid Racing Conversion Harness

Quick Overview

• CORE required
• Brand new connectors and pins sourced from the same company Honda uses.
• Free phone and email tech support.
• 1000's of customers can't be wrong.

I see that a core is required for your EF harness, What do I need to send you?

Since the EF chassis is so old we are unable to source 2 connectors from the OEM supplier. In order for us to provide you with an engine harness we need your stock EF engine harness.

Please ship us your engine harness to the address located HERE.

Make sure to include a copy of your online order and your contact information.

What makes Hybrid Racing's Harness the best on the market?

Hybrid Racing completed their first K-swap over five years ago and pioneered a lot of the products that you currently see on K swapped vehicles. One of those products is the conversion harness. This harness interfaces with the factory dash harness, your OEM K series engine harness and your K series ECU to greatly simplify the swap wiring.

What's new about the Version 3 Hybrid Racing Harnress?

The new Hybrid Racing Conversion harness incorporates updated wiring to make for an even easier install, updated install guide that includes more pictures and less text and the integration of the oxygen sensor connector making it super easy to install. No more fumbling with your stock O2 sensor connector and cutting and connecting etc.

What type of connectors and pins do you use?

When we construct a Hybrid Racing harness we utilize brand new connectors and pins sourced from the same company that Honda utilizes for their connectors.

These connectors are ordered in bulk from Japan and ensure that your getting all new parts. In addition, all new connectors decrease the chance for errors in the harness as we do not solder any of the joints. The Hybrid Racing Conversion Harness allows for full functionality of the factory gauge cluster and comes with 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 and they are available for overnight shipment.

What if I have questions or problems?

To ensure a trouble free install all of the wires are labeled and neatly packaged. The most valuable thing you get when you purchase a Hybrid Racing harness is full tech support. This tech support extends beyond your harness and includes help with anything associate with your swap. If you have any problems at all with the swap just give us a call and a tech will get you the information you need. It’s like having a buddy down the street who has already done hundreds of K swaps!