These wiring harnesses are similar in design to factory GM LS coil harnesses, but they are a direct plug and play to the Aeroflow Performance Smart Coils (AF4020-8289). They plug into most GM LS plug and play main harnesses if you want to replace factory GM LS coils with ign-1a smart coils. Includes a pair of coil harnesses for an 8-cylinder engine.

Note: Will work with E38 ECU. Harness has an extra ground which needs to be ground on the rear of the cylinder head then the car will fire up. For best performance you can adjust the injection dwell times with HP tuners or any equivalent aftermarket tuning software. Harness can be used with any aftermarket ECU i.e Haltech