Welcome to MCB Parts

My Cart:

0 item(s)
You have no items in your shopping cart.


Welcome to our online store!

Holley Ford MPFI Coil On Plug Main Harness: 558-118

SKU: 558-118

Availability: In stock

Handling Time: 30 Days


Ford MPFI Coil On Plug Main Harness:

Ford MPFI Coil On Plug Main Harness:

This harness provides a plug and play upgrade solution for those seeking to convert to Coil-On-Plug. Additionally we have pre-installed a Power Tap for easy access to 12v, 5v Reference, and Sensor Grounds. The Ford MPFI C-O-P Main Harness has also been pre-terminated for the stock Pulse Width Modulated Idle Air Control motors commonly found on Fuel Injected Windsor 5.0L engines.


  • Built in C-O-P Harness
  • 0
  • Additional 40 amp relay to power individual coils
  • 0
  • Pre-Terminated for Ford PWM IAC
  • 0
  • 20awq gauge wire or larger!
  • 0
  • Plug and play with 558-312 or 558-318 Smart Coil Sub Harnesses
  • 0
  • Dual CANbus Connectors for multiple CAN devices
  • 0
  • Multiple sensor lengths have been extended to accommodate various intake designs

Installation Note:


  • Brand: Holley EFI
  • Emission Code: 4
  • Harness Application: Ford
  • Harness Type: Main
  • Product Type: EFI Main Engine Harness