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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 Series™ 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!

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Items 1-9 of 9
Description: Ignition Wiring Harness, Big Wire C-N-P Sub Harness, V8, Each
Item #: HLY558-318
Condition: New
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Price: $246.00
Sale: $220.95
Save: 10%
Save: $25.05

Description: Wiring Harness Adapter, Delphi M/P 3 Pin to Delphi GT 3 Pin, GM LS-Series, Each
Item #: HLY558-467
Condition: New
Limited Supply: Only 3 Left!
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Orders over $149 ship free. Oversize items are excluded.
Price: $27.19
Sale: $21.28
Save: 22%
Save: $5.91

Description: Ignition Wiring Harness, Flying Lead, 15 ft Long, Crimped, Universal, Kit
Item #: HLY558-126
Condition: New
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Price: $423.00
Sale: $379.95
Save: 10%
Save: $43.05


Description: Ignition Wiring Harness, Coil-On-Plug Main Harness, Ford MPFI, Each
Item #: HLY558-118
Condition: New
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Price: $593.00
Sale: $532.95
Save: 10%
Save: $60.05


Description: Ignition Wiring Harness, Factory Replacement, Injector Sub Harness, GM LS-Series, Kit
Item #: HLY558-321
Condition: New
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Price: $195.00
Sale: $174.95
Save: 10%
Save: $20.05

Description: Wiring Harness Adapter, LS Main Harness to LS3 Map Sensor, Each
Item #: HLY558-416
Condition: New
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Orders over $149 ship free. Oversize items are excluded.
Price: $39.80
Sale: $35.82
Save: 10%
Save: $3.98

Description: Wiring Harness Adapter, MPDI Map Sensor to Delphi GT Sensor, Each
Item #: HLY558-466
Condition: New
Limited Supply: Only 3 Left!
Same Day Shipping!
Orders over $149 ship free. Oversize items are excluded.
Price: $39.80
Sale: $35.82
Save: 10%
Save: $3.98

Description: Ignition Wiring Harness, Coil-On-Plug to Sub Harness, Holley Hp / Dominator EFI, Each
Item #: HLY558-307
Condition: New
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Price: $172.00
Sale: $153.95
Save: 10%
Save: $18.05

Description: Ignition Wiring Harness, Coil-On-Plug Main Harness, Universal, Each
Item #: HLY558-117
Condition: New
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Price: $559.00
Sale: $502.95
Save: 10%
Save: $56.05


Items 1-9 of 9

More About 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 Series™ 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!