An EFI system depends heavily on being supplied a clean and constant voltage source. The grounds of an electrical system are just as important as the power side. Our Holley EFI Harness Kit for your GM LS engine comes complete with the main harness, power harness and injector harness to support your primary system!

Features

• 4150 8 Injector Units Support up to 650 HP Naturally Aspirated or 1250 HP with Forced Induction
• Available in 3 Finishes: Shiny, Black, and Gold