Tuners will appreciate the advantages - no more lying on your back in the footwell of a vehicle to add electronics to the harness, you can add ancillary electronics from the bench, debug by simply unplugging the harness, integrate the Patch/Extension Harness as part of your electronics package, and test new electronics from the bench instead of the vehicle.
AEM’s Patch/Extension Harnesses are simple to install. They connect in between the factory harness terminal and the ECU terminal.
NOTE: Legal in California only for racing vehicles which may never be used upon a highway.