Plug-and-Play harness assemblies for GM 12200411 PCM and Holley HP ECU. These harnesses are built to order and provide easy integration into your F-Body.

Modern ultrasonic splicing allows us to exceed the build quality of the original GM harnesses. Hand-build with production crimp tools and genuine OE connectors. We've gone even further to design and manufacture a replacement hardshell grommet for the harness to enter the vehicle.