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HOLLEY - Online Store Products

A leader in fuel systems for over 100 years, Holley carburetors have powered every NASCAR Sprint Cup team and nearly every NHRA Pro–Stock champion for four decades. Now, Holley offers EFI systems for GM's LS engine, among many other applications. Holley's products also include performance fuel pumps, intake manifolds, and engine dress–up products for street performance, race, and marine applications.

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Main Wiring Harness Ls1 & Ls6

Efi Wiring Harness - Main Harness - Holley HP / Dominator Efi - 24x Reluctor Wheel - Ls1 / Ls6 - GM LS-SERIES - Eac...
HOLLEY | Part# HLY-558-102 More Details...

$532.95
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Main Wiring Harness Ls2 & Ls3

Efi Wiring Harness - Main Harness - Holley HP / Dominator Efi - 58x Reluctor Wheel - Ls2 / Ls3 / Ls7 - GM LS-SERIES...
HOLLEY | Part# HLY-558-103 More Details...

$532.95
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Main Harness - Universal Mpfi

Efi Wiring Harness - Mpfi Main Harness - Holley HP / Dominator Efi - Universal - Each
HOLLEY | Part# HLY-558-104 More Details...

$446.95
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Main Harness - Univesal UN-TERMINATED

Efi Wiring Harness - Unterminated Main Harness - Holley HP / Dominator Efi - Kit
HOLLEY | Part# HLY-558-105 More Details...

$445.95
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Injector Wiring Harness V8 Bosch Style I

Efi Wiring Harness - Bosch Style Injectors - Holley Dominator Efi - Each
HOLLEY | Part# HLY-558-200 More Details...

$162.95
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Injector Wiring Harness V8 Ev6 Style Inj

Efi Wiring Harness - Ev6 Style Injectors - Holley Dominator Efi - Each
HOLLEY | Part# HLY-558-201 More Details...

$138.95
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Ignition Harness W/MAGNETIC Pickup

Efi Wiring Harness - Magnetic Pickup - Holley Dominator Efi - GM LS-SERIES - Each
HOLLEY | Part# HLY-558-303 More Details...

$76.72
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Hei Ignition Harness

Efi Wiring Harness - Ignition Adapter Harness - GM Small Cap Hei Distributor To Holley Avenger / HP / Dominator Efi...
HOLLEY | Part# HLY-558-304 More Details...

$41.17
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Efi Main Power Harness

Efi Wiring Harness - Main Power - Holley Dominator Efi - Each
HOLLEY | Part# HLY-558-308 More Details...

$81.77
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J1A/B INPUT/OUTPUT Connector

Efi Wiring Harness - J1A/B - Holley Dominator Efi - Each
HOLLEY | Part# HLY-558-400 More Details...

$93.80
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