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Ships within 48 hours · Estimated delivery Aug 17 - Aug 22
Models with Single Exhaust
Muffler Series: 60 Series
1993-1997 Pontiac Firebird
1979-1986 GMC G1500
Instructions and all the necessary hardware are included with the kit for an easy bolt-on installation
GM 58X EFI HARNESS KIT - 558-501 Medium Margin Models with Single ExhaustOverview: 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 comes complete with the main harness, power harness and injector harness to support your primary system! Features: Harness Kit Includes; Main Power Harness, LS2 Main Harness & LSX Injector harness Simple Installation Works with HP or Dominator ECU's
