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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!

Holley EFI Categories

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Items 101-106 of 106
Weather Pack Kit
Weather pack connectors are designed for harsh weather conditions. Originally used by top vehicle manufacturers, the reliability of these connectors has been proven for years and they have become...More Details »
Weather Pack Pin
Electrical Connectors from Pit Stop USA are available in a variety of configurations at low everyday prices. Components of an electrical circuit are electrically connected if an electric current...More Details »
Wiring Harness Adapter
Wiring Harness Adapters allow you to retrofit components like aftermarket ignition systems, headlights and tail lights, engine swaps, fuel injection, gauges, steering columns and more to OE wiring harnesses.
Wiring Harness Adapter
Weatherpack to MSD distributor Wiring Harness Adapter make connecting your weatherpack ignition connector to your MSD or other 2-pin magnetic-style distributor easy.
Wiring Harness Adapters
Wiring Harness Adapters allow you to retrofit components like aftermarket ignition systems, headlights and tail lights, engine swaps, fuel injection, gauges, steering columns and more to OE wiring harnesses.
Wiring Pigtails
Whether it is an alternator, electric fan, fuel pump or other component wiring projects, we have a wide variety of wiring pigtails that make it simple to complete the job.
Items 101-106 of 106

Holley EFI Products

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Items 401-410 of 410
Description: Weather Pack Pin, 20-24 Gauge Wire, Set of 100
Item #: HLY571-135
Condition: New
Limited Supply: Only 8 Left!
Same Day Shipping!
Orders over $149 ship free. Oversize items are excluded.
Price: $56.89
Sale: $51.20
Save: 10%
Save: $5.69

Description: Weather Pack Pin, 18-16 Gauge Wire, Male, Set of 100
Item #: HLY571-136
Condition: New
Limited Supply: Only 5 Left!
Same Day Shipping!
Orders over $149 ship free. Oversize items are excluded.
Price: $56.89
Sale: $51.20
Save: 10%
Save: $5.69

Description: EGT Sensor Bung, Weld-On, 1/4 in NPT Female, Stainless, Natural, Set of 8
Item #: HLY543-163
Condition: New
Same Day Shipping!
Orders over $149 ship free. Oversize items are excluded.
Price: $160.00
Sale: $143.95
Save: 10%
Save: $16.05

Description: EGT Sensor Bung, Weld-On, 1/4 in Probe, Stainless, Natural, Each
Item #: HLY543-161
Condition: New
Limited Supply: Only 3 Left!
Same Day Shipping!
Orders over $149 ship free. Oversize items are excluded.
Price: $24.11
Sale: $21.70
Save: 10%
Save: $2.41

Description: EFI Wiring Harness, EV6 Style Injectors, Holley 58X Crank Sensor EFI, Each
Item #: HLY558-501
Condition: New
Same Day Shipping!
FREE SHIPPING!
Free Ground Shipping
Price: $816.00
Sale: $733.95
Save: 10%
Save: $82.05




Not available for shipment to Alaska or Hawaii.
Description: EFI Wiring Harness, Input / Output, Holley Terminator EFI, Each
Item #: HLY558-420
Condition: New
Limited Supply: Only 3 Left!
Same Day Shipping!
Orders over $149 ship free. Oversize items are excluded.
Price: $45.50
Sale: $40.95
Save: 10%
Save: $4.55

Description: Wiring Harness, J3 Auxiliary Input / Output Connector, Dominator EFI, Each
Item #: HLY558-403
Condition: New
Same Day Shipping!
Orders over $149 ship free. Oversize items are excluded.
Price: $160.00
Sale: $143.95
Save: 10%
Save: $16.05

Description: Gauge Wiring Harness, EFI Digital Dash, Kit
Item #: HLY558-433
Condition: New
Same Day Shipping!
FREE SHIPPING!
Free Ground Shipping
Price: $297.00
Sale: $266.95
Save: 10%
Save: $30.05


Description: EFI Wiring Harness, Ignition Adapter Harness, HyperSpark Distributors to Holley EFI, Each
Item #: HLY558-323
Condition: New
Limited Supply: Only 2 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: Brake Fluid, Fade-Free, DOT 5, 12 oz Bottle, Each
Item #: ATPJOHN7012
Condition: New
Limited Supply: Only 1 Left!
Same Day Shipping!
Orders over $149 ship free. Oversize items are excluded.
Price: $15.99
Sale: $14.97
Save: 6%
Save: $1.02

Items 401-410 of 410

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!