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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!
Browse Fuel Injection System Wiring Harnesses Products
Items 1-25 of 34
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Description: CAN Wiring Harness, Extension Harness, 12 ft Long, Black Rubber Coated, Each
Item #: HLY558-426
Condition:
New
Limited Supply: Only 5 Left!
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Orders over $149 ship free. Oversize items are excluded.
Price: $68.28
Sale: $61.45
Save: 10%
Save: $6.83
Description: CAN Wiring Harness, Extension Harness, 8 ft Long, Black Rubber Coated, Each
Item #: HLY558-425
Condition:
New
Limited Supply: Only 6 Left!
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Orders over $149 ship free. Oversize items are excluded.
Price: $56.89
Sale: $51.20
Save: 10%
Save: $5.69
Description: CAN Wiring Harness, Extension Harness, 9 in Long, Black Rubber Coated, Each
Item #: HLY558-428
Condition:
New
Limited Supply: Only 4 Left!
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Orders over $149 ship free. Oversize items are excluded.
Price: $45.50
Sale: $40.95
Save: 10%
Save: $4.55
Description: CAN Wiring Harness, Male To Female Adapter, 4 ft Long, Black Rubber Coated, Each
Item #: HLY558-452
Condition:
New
Limited Supply: Only 3 Left!
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Orders over $149 ship free. Oversize items are excluded.
Price: $45.50
Sale: $40.95
Save: 10%
Save: $4.55
Description: EFI Wiring Harness, Crank / Camshaft Ignition Harness, Holley Hp / Dominator EFI, Universal, Kit
Item #: HLY558-410
Condition:
New
Limited Supply: Only 0 Left!
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Price: $95.50
Sale: $85.95
Save: 10%
Save: $9.55
Description: Wiring Harness, Drive by Wire Dual Throttle Body, Mopar Gen III Hemi, Each
Item #: HLY558-450
Condition:
New
Limited Supply: Only 6 Left!
Ships direct from manufacturer.
FREE SHIPPING!
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Price: $312.00
Sale: $279.95
Save: 10%
Save: $32.05
Description: EFI Wiring Harness, J2B Auxiliary Connector Harness, Holley Dominator EFI, Universal, Kit
Item #: HLY558-402
Condition:
New
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Price: $160.00
Sale: $143.95
Save: 10%
Save: $16.05
Description: EFI Wiring Harness, J2A Auxiliary Connector Harness, Holley Dominator EFI, Universal, Kit
Item #: HLY558-401
Condition:
New
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Price: $228.00
Sale: $204.95
Save: 10%
Save: $23.05
Description: EFI Wiring Harness, Drive by Wire, Holley Dominator EFI, GM, Each
Item #: HLY558-406
Condition:
New
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Price: $246.00
Sale: $220.95
Save: 10%
Save: $25.05
Description: EFI Wiring Harness, Drive by Wire, Holley Dominator EFI, GM, Each
Item #: HLY558-429
Condition:
New
Same Day Shipping!
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Price: $246.00
Sale: $220.95
Save: 10%
Save: $25.05
Description: Transmission Wiring Harness, Plug-N-Play, j4 Connector, 4R70W / 4R75W, Ford, Each
Item #: HLY558-470
Condition:
New
Limited Supply: Only 3 Left!
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Price: $234.00
Sale: $209.95
Save: 10%
Save: $24.05
Description: EFI Wiring Harness, Transmission, Holley Dominator EFI, GM 4L60E / 4L80E, Each
Item #: HLY558-405
Condition:
New
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Price: $302.00
Sale: $270.95
Save: 10%
Save: $31.05
Description: EFI Wiring Harness, Ignition Adapter Harness, GM Small Cap HEI Distributor to Holley Avenger / Hp / Dominator EFI, Each
Item #: HLY558-304
Condition:
New
Limited Supply: Only 3 Left!
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Orders over $149 ship free. Oversize items are excluded.
Price: $51.19
Sale: $46.07
Save: 10%
Save: $5.12
Description: EFI Wiring Harness, EV6 Style Injectors, Holley HP / Dominator EFI, Each
Item #: HLY558-207
Condition:
New
Same Day Shipping!
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Price: $278.00
Sale: $249.95
Save: 10%
Save: $28.05
Description: EFI Wiring Harness, EV1 Style Injectors, Ford V8, Each
Item #: HLY558-213
Condition:
New
Limited Supply: Only 3 Left!
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Price: $172.00
Sale: $153.95
Save: 10%
Save: $18.05
Description: EFI Wiring Harness, J1A/B, Holley Dominator EFI, Each
Item #: HLY558-400
Condition:
New
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Orders over $149 ship free. Oversize items are excluded.
Price: $110.00
Sale: $98.35
Save: 11%
Save: $11.65
Description: EFI Wiring Harness, J4 Auxiliary Harness, Holley Dominator EFI, Each
Item #: HLY558-404
Condition:
New
Same Day Shipping!
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Price: $195.00
Sale: $174.95
Save: 10%
Save: $20.05
Description: EFI Wiring Harness, Main Harness, Holley Hp / Dominator EFI, 24x Reluctor Wheel, LS1 / LS6, GM LS-Series, Each
Item #: HLY558-102
Condition:
New
Same Day Shipping!
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Price: $627.00
Sale: $563.95
Save: 10%
Save: $63.05
Description: EFI Wiring Harness, Main Harness, Holley Hp / Dominator EFI, 58x Reluctor Wheel, LS2 / LS3 / LS7, GM LS-Series, Each
Item #: HLY558-103
Condition:
New
Same Day Shipping!
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Free Ground Shipping
Price: $627.00
Sale: $563.95
Save: 10%
Save: $63.05
Description: EFI Wiring Harness, EV6 Style Injectors, Holley Dominator EFI, Each
Item #: HLY558-201
Condition:
New
Same Day Shipping!
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Free Ground Shipping
Price: $172.00
Sale: $153.95
Save: 10%
Save: $18.05
Description: EFI Wiring Harness, Magnetic Pickup, Holley Dominator EFI, GM LS-Series, Each
Item #: HLY558-303
Condition:
New
Same Day Shipping!
Orders over $149 ship free. Oversize items are excluded.
Price: $91.06
Sale: $81.95
Save: 10%
Save: $9.11
Description: Engine Wiring Harness, Holley Smart Coils, Ford Modular, Each
Item #: HLY558-113
Condition:
New
Ships direct from manufacturer.
FREE SHIPPING!
Free Ground Shipping
Price: $775.00
Sale: $696.95
Save: 10%
Save: $78.05
Description: EFI Wiring Harness, Main Power, Holley Dominator EFI, Each
Item #: HLY558-308
Condition:
New
Same Day Shipping!
Orders over $149 ship free. Oversize items are excluded.
Price: $97.89
Sale: $88.10
Save: 10%
Save: $9.79
Description: Wiring Harness Adapter, LS Main Harness to LS3 Map Sensor, Each
Item #: HLY558-416
Condition:
New
Same Day Shipping!
Orders over $149 ship free. Oversize items are excluded.
Price: $39.80
Sale: $35.82
Save: 10%
Save: $3.98
Description: EFI Wiring Harness, Camshaft Ignition Harness, Holley Hp / Dominator EFI, Universal, Kit
Item #: HLY558-431
Condition:
New
Same Day Shipping!
Orders over $149 ship free. Oversize items are excluded.
Price: $91.06
Sale: $81.95
Save: 10%
Save: $9.11
Items 1-25 of 34
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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!
