GM TPI and Holley Stealth Ram&trade:; 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. Holley’s Holley EFI Harness Kit comes complete with the main harness, power harness and injector harness to support your primary system! Holley EFI 558-503 GM TPI
» Read moreGM TPI and Holley Stealth Ram&trade:; 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. Holley’s Holley EFI Harness Kit comes complete with the main harness, power harness and injector harness to support your primary system! Holley EFI 558-503 GM TPI
» Read moreGM TPI and Holley Stealth Ram&trade:; 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. Holley’s Holley EFI Harness Kit comes complete with the main harness, power harness and injector harness to support your primary system! Holley EFI 558-503 GM TPI
» Read moreGM TPI and Holley Stealth Ram&trade:;Harness Kit Includes: Stealthram/TPI Main Harness, Main Power Harness, V-8 Injector Harness, HEI Ign Harness and Ignition Adapter & Tach Input; Simple Installation; Works with HP or Dominator ECU’s. Holley EFI 558-503 GM TPI and Stealth Ram EFI Harness Kit. GM TPI and Holley Stealth Ram&trade:; An EFI system depends heavily on being supplied a
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