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:
  • Harness Kit Includes; Main Power Harness, LS1 Main Harness & V-8 Injector harness
  • Simple Installation
  • Works with HP or Dominator ECU's
  • More From This Category

    Holley Workbench Mat, Laptop Tuning, EFI, 12 in. Length, 18 in. Width, Foam, Black, Each

    Holley Workbench Mat, Laptop Tuning, EFI, 12 in. Length, 18 in. Width, Foam, Black, Each

    $29.39

    Classic Instruments Gauge Set, V8 Red Steelie, Universal, GM, Set of 3

    Classic Instruments Gauge Set, V8 Red Steelie, Universal, GM, Set of 3

    $1,854.92

    APR Spherical Pendulum Transmission Mount, DOGBONE MOUNT KIT

    APR Spherical Pendulum Transmission Mount, DOGBONE MOUNT KIT

    $649.17