Universal MPFI Coil on Plug Main Harness

Holley EFI Universal MPFI Coil-On-Plug Main Harness – 558-117

Designed as a plug-and-play upgrade solution for applications converting to coil-on-plug ignition, this Holley EFI universal MPFI main harness combines the main EFI wiring with built-in coil-on-plug support.

A pre-installed Power Tap provides convenient access to 12V power, 5V reference and sensor grounds, helping simplify installation in custom high-performance EFI applications.

Features:

• Universal MPFI coil-on-plug main harness
• Built-in coil-on-plug harness
• Additional 40-amp relay for powering individual coils
• 20 AWG wire or larger
• Plug-and-play with Holley 558-312 or 558-318 Smart Coil sub-harnesses
• Dual CAN bus connectors for multiple CAN devices
• Pre-installed Power Tap for 12V, 5V reference and sensor grounds
• Harness Application: Universal
• Harness Type: Main
• Holley Part #558-117