Accessories
Air and Fuel Delivery
Belts and Cooling
Body
Brake
Engine
Driveline and Axles
Electrical, Charging and Starting
Electrical, Lighting and Body
Emission Control
Entertainment and Telematics
Exhaust
HVAC
Ignition
Suspension
Steering
Tire and Wheel
Transfer Case
Transmission
Wiper and Washer
558-420 contains 5 extra input/output wires that the base Terminator EFI harness does not contain. It contains Input wires for Inputs 1-4. It contains one wire for Output 2. These inputs and outputs can perform features and functions that must be programmed via Holley EFI laptop software. The software also contains instructions on how to program these.
