This 4L60e 4L80e GM Transmission Extension Harness for 26 Pin J4 P4 Holley EFI Terminator X Max 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 harness is custom-made to your selected length. We are unable to accept returns on custom length harnesses.