Home » Holley EFI Ignition Adapter Harness - MSD Distributors to Holley EFI
Holley EFI Ignition Adapter Harness - MSD Distributors to Holley EFI
Holley EFI Ignition Adapter Harness - MSD Distributors to Holley EFI
Holley EFI

Holley EFI Ignition Adapter Harness - MSD Distributors to Holley EFI

In stock
SKU: HLY558-325
EFI Wiring Harness, Ignition Adapter Harness, MSD Distributors to Holley EFI, Each
$39.49
Sale $44.43 $39.49
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PROP 65: These products may contain a chemical known to the state of California to cause cancer and birth defects or other reproductive harm

Designed to plug and play with MSD Pro-Billet distributors and Holley EFI main harnesses with an ignition connector, such as part number 558-104.

Product Description:

  • EFI Wiring Harness
  • Ignition Adapter Harness
  • MSD Distributors to Holley EFI

    • Holley is quickly becoming The New Standard In EFI! Holley’s HP ECU is standard equipment on the 2013/2014 Chevrolet COPO Camaro and Holley’s EFI throttle body powers every NASCAR Sprint Cup Seriesâ„¢ team. Top racers are making the switch to Holley EFI every day. Racers like Tom Bailey who set three new records and took the overall event win on the 2013 Hot Rod Magazine Drag Week and John Scali who used it to win the 2013 JEGS All-Star race. But that’s not all. The world’s best hot rod builders and tuners are making the switch to Holley EFI. Builders like Dave Lane who used Holley EFI to power the 2013 Goodguys Hot Rod of the Year and tuners like Steve Morris who use it to build some of the baddest forced induction beasts on the planet. It’s the easiest, most refined, feature-rich system that money can buy. But, don’t take our word for it, see what the best are saying about Holley EFI!