NOTICE: You will need to purchase an ECU and O2 Sensor to make this a complete kit.
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!
- Harness Kit Includes; Main Power Harness, LS2 Main Harness & LSX Injector harness
- Simple Installation
- Works with HP or Dominator ECU's
GM 58X EFI HARNESS KIT
Brand Holley EFI Emission Code 4 Harness Application LSX Product Type Harness Kit Part Number 558-501
This part is legal for sale or use on Racing Use Only Vehicles
The following vehicles are considered Racing Use Only Vehicles:
- Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street
WARNING: It is against the law to install this part on an Emissions Controlled Vehicle