This J1B P1B 26-pin Extension Harness for Holley EFI Terminator X ECU is a build-to-length Holley EFI Extension Harness and is perfect to extend any of the included Holley ECU harnesses to reach the distance you need.
Each build-to-length harness is custom-made to your selected length. We are unable to accept returns on custom-length harnesses.