Now available for order! Initial stock is limited, and all harnesses will ship on a first come, first serve basis. K24A2 harnesses will ship before K24Z3 harnesses.

Our new all-in-one Haltech engine and conversion harness streamlines and transforms the way K swaps are wired in the NA and NB Miata chassis. There are so many features and possible configurations packed into this new harness. Most notably:

-Compatible with a new ECU option: a Haltech Elite 1500

-Available for both cable and drive-by-wire throttle

-Multiple injector subharnesses available for any application

-Built-in fuse and relay box for simple, straightforward, and reliable wiring

-No more dash removal! The supplied sub-harness needs to be spliced to the gauge cluster pins, and one fuel pump wire run to the tank, but the dash can now remain in the vehicle

-Motorsports grade construction. 100% brand new connectors, Teflon coated wire, and Raychem DR-25 loom

-Haltech harnesses are pre-wired for the Bosch oil pressure and temperature sensor and CAN wideband controller

-Pre-wired for A/C, radiator fans, and flex fuel

-Configurations available for both K24A and K24Z sensors

-DBW version includes connector for a 2nd gen Honda Fit throttle pedal. To be paired with our Fit pedal adapter

-includes under-dash subharness

-Includes fuse box bracket for easy mounting under the hood

-Installation instructions can be downloaded here

This harness replaces the original KPro conversion harness, as well as the OEM engine harness (or KPower RWD harness). If you'd like to use KPro, please order our original conversion harness and engine harness of your choice. 

Note: for the NA chassis, a 2" hole needs to be drilled in the center of the firewall to accept the supplied grommet.