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Holley EFI

For use with Holley® HP and Dominator ECUs and other EFI systems

: In stock

: Ignition Harness

: Holley EFI

: 558-307

$191.95 $211.95

Universal Coil On/Near Plug Harness – Use to connect Holley PN 558-312 or factory GM LSx coil harnesses to Holley HP or...
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Universal Coil On/Near Plug Harness – Use to connect Holley PN 558-312 or factory GM LSx coil harnesses to Holley HP or Dominator ECU's

Your order of 100$ or more gets free standard delivery.

  • Standard delivered 4-5 Business Days
  • Express delivered 2-4 Business Days

Orders are processed and delivered Monday-Friday (excluding public holidays)


eMarket members enjoy free returns.

For use with Holley® HP and Dominator ECUs and other EFI systems

$191.95 $211.95