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

    Racepak Data Acquisition Component, Serial Communications Cable, 6 ft. Length, for UDX Dashes, Each

    Racepak Data Acquisition Component, Serial Communications Cable, 6 ft. Length, for UDX Dashes, Each

    $221.89

    Rostra Transmission External Wire Harness Repair Kit w/ Connector. Chrysler 45/545/68RFE, 62TE, Chrysler, Dodge, Fiat, Jeep, Volkswagen, 1999-2018

    Rostra Transmission External Wire Harness Repair Kit w/ Connector. Chrysler 45/545/68RFE, 62TE, Chrysler, Dodge, Fiat, Jeep, Volkswagen, 1999-2018

    $149.71

    Racepak Accessories, Harness Power Udxsr W/Wires

    Racepak Accessories, Harness Power Udxsr W/Wires

    $136.31