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Universal MPFI Coil On Plug Main Harness

by Holley
SKU 558-117
Original price $502.95 - Original price $502.95
Original price
$502.95 - $502.95
Current price $502.95
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.


  • Built in C-O-P Harness
  • Additional 40 amp relay to power individual coils
  • 20awq gauge wire or larger!
  • Plug and play with 558-312 or 558-318 Smart Coil Sub Harnesses.
  • Dual CANbus Connectors for multiple CAN devices

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