99-00 Civic EK K Series Conversion Harness

99-00 Civic EK K Series Conversion Harness

This conversion harness is needed to interface your vehicle chassis with its new swapped hybrid motor.

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Availability: Made to Order (2-3 weeks wait)

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Vehicle Type
Important for us to know when tailoring to your specific wiring needs.
99-00 Civic EK 
Nitrous Relay Prewired?

We innovated the option to have your Nitrous relay pre-wired and pre-pinned into your ECU.

Yes, I am on the bottle :) [Add $10.00]
Need Secondary O2 Sensor?
Yes, Please [Add $10.00]
Need OBD2 Scan Port?
Yes, Please. [Add $10.00]
Custom Sleeving Choices

Upgrade your harness sleeving!

Raychem DR-25 [Add $35.00]

The Wireworx Conversion Harness offers Mil-Spec Teflon coated wire using standard factory wire colors with a maximum heat rating of 200°C individually striped for easy identification and is as plug and play as possible, to make your swap easy as possible. The harness is built with aesthetics and functionality in mind. We’ve done years of R&D for proper wiring technique, properly crimped terminals harnesses are also well fitted with enough slack where needed. It features a stealthy look but is also easily accessible once installed.


This conversion harness is needed to interface your vehicle chassis with its new swapped hybrid motor.


What it interfaces are things like: RPM, Vehicle Speed sensor readings, sends power from the chassis to the necessary points in your swap motor's wiring, among other things.


The standard version of The Wireworx conversion harness comes with the following:

• Primary Oxygen Sensor lead

•Oxygen Sensor Heater

•Prewired with all the basic signals needed to make your swap interface with your swap chassis, in a plug and play fashion.


•The following are Optional:

- Secondary Oxygen Sensor

- Nitrous relay pre wired

- Plug and Play, zero splice  chassis ecu connector


Each and every Wireworx conversion harness is pre wired for plug and play connection of a Wireworx engine harness; un-separated Engine Coolant Temp sensor, un-separated Fan Switch and Charging light. Which allows each of these signals to be hooked up to your chassis in a plug and play fashion, no splicing needed on your part. Only available if mating a new Wireworx engine harness to a Wireworx conversion harness.


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