GM LS 58X EFI HARNESS KIT - 558-502 map-sensors and you'll do so at

and you'll do so at a 60% CFM improvement over stock

The unique interlocking stainless steel insert prevents the input spline from wearing out over time

Black mil-spec nickel PTFE hard anodized billet base

Available in a high heat resistant black paint or a satin silver metallic ceramic thermal barrier coating

1963-1964 Dodge 330 383 CID

GM LS 58X EFI HARNESS KIT - 558-502 map-sensors and you'll do so atOverview: 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 & V 8 Injector harness Simple Installation Works with HP or Dominator ECU's