Product Update: Due to the discontinuation of the Haltech Elite 1500 ECU, KPower is transitioning this product to accommodate the new Haltech S2 ECU and wideband sensor.

All harnesses and packages ordered after August 19, 2026 will ship configured for the Haltech S2 ECU and, where applicable, include the S2 ECU and wideband sensor.

Some products may experience extended lead times during this transition. Please contact us before ordering if you would like a current lead-time estimate.

Our motorsports grade K series to NC engine wiring harness is a work of art, both in design and construction. We spared no expense in bringing you the ultimate plug and play engine harness for your K swapped NC. It is a central piece of our NC MX5 Electronics Package. 

This harness features:

• A 100% plug-and-play design
• All new OEM K series connectors
• A fuel injector sub-harness that makes changing to a different fuel injector extremely easy
• Teflon-coated high temperature wire
• Raychem DR-25 heat shrink loom
• Pre-wired for NC A/C compressor
• Pre-wired for Bosch oil pressure and temperature sensor
• Expansion connector for flex fuel
• Sensor labels to make installation easy

This engine harness is designed to pair with our chassis wiring adapter, a Haltech Elite 1500 ECU, Bosch Oil Temp/Pressure combo sensor, KPower Flex Fuel Kit, and a Haltech CAN wideband. 

Notes:

• All products are designed for off-road motorsports use only. Users are responsible for complying with all local laws in their county, state, and country.
• Note that our engine wiring harness is designed for 2004-2008 K24A sensors, including the crank sensor, knock sensor, and injectors. 
• If you plan on using injectors other than OEM K24A injectors, please specify at checkout and we’ll swap in the appropriate injector sub-harness free of charge.   If you opt for injectors from our Fuel Delivery Collection, just add a note that you want a matching connector!