Part # 558-420
$63.95
PN 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.
Fits: This kit contains 4 extra input wires and 1 extra output wire that the base Terminator EFI harness does not contain.
| Harness Type | Auxiliary |
The EFI Brain
Chat is launching soon. In the meantime, reach us directly — email is fastest.
Email horsepowerconnection@gmail.com Text 928-706-6112 Call 928-706-6112 All support options ›