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Holley

Holley 558-219 Injector Driver Harness

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$488.76

The Holley EFI Injector Driver Harness comes pre-terminated with a J2B connector, for plug and play connectivity with your Dominator ECU. This harness is...

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Holley

Holley 558-220 Efi Gm Gen V Gdi Subharness

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$221.73

GM GEN V GDI Sub harness for early LTx Engines. The fuel pressure sensor easily identifies these engines, early engines use a 4-pin fuel...

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Holley

Holley 558-221 Efi Gm Gen V Gdi Subharness

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$221.73

GM GEN V GDI Sub harness for Late LTx Engines. The fuel pressure sensor easily identifies these engines, Late engines use a 3-pin fuel...

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Holley

Holley 558-302 Tach Input Ignition Adapter

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$35.81

This is only used on applications using a CD Box, such as an MSD 6AL, while not using timing control. Specifications: Description_ASC Plugs into...

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Holley

Holley 558-303 Magnetic Pick-up Ignition Harness

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$113.15 $112.26

Shielded Unterminated Magnetic Pick-Up harness for Holley EFI systems Specifications: Description_DEF Distributor Ignition Pickup Description_DES Magnetic Pick-up Ignition Harness Description_EXT Magnetic Pickup Ignition Harness;...

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Holley

Holley 558-304 HEI GM Small Cap Ignition Harness

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$113.81 $94.50

HEI Adapter Harness Specifications: Description_DEF Ignition Harness Description_DES HEI GM Small Cap Ignition Harness Description_FAB HEI Ignition Harness Description_EXT HEI Ignition Harness for Avenger...

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HOLLEY

HOLLEY 558-304 HEI Ignition Harness

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$88.70

EFI Wiring Harness - Ignition Adapter Harness - GM Small Cap HEI Distributor to Holley Avenger / HP / Dominator EFI - Each

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Holley

Holley 558-305 Ford TFI Ignition Harness

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$207.35 $200.90

Ford TFI Ignition Adapter Harness Specifications: Description_DEF Ignition Harness Description_EXT TFI Ignition Harness; For Use w/Avenger EFI/HP EFI/Dominator EFI Systems; Description_DES Ford TFI Ignition...

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HOLLEY

HOLLEY 558-305 Ford TFI Ignition Harness

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$178.11 $0.00

EFI Wiring Harness - Ignition Adapter Harness - Ford TFI Distributor to Holley Avenger / HP / Dominator EFI - Each

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Holley

Holley 558-306 Universal Unterminated Ignition Harness

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$303.45

Universal Unterminated Ignition Harness for HP EFI & Dominator EFI Specifications: Description_DEF Ignition Harness Description_DES Universal Unterminated Ignition Harness Description_KEY Universal; unterminated; Ignition; Description_FAB...

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HOLLEY

HOLLEY 558-307 LS Coil On Plug Harness Universal

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$265.65 $0.00

Ignition Wiring Harness - Coil-On-Plug to Sub Harness - Holley HP / Dominator EFI - Each

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Holley

Holley 558-307 Universal Coil On/Near Plug Harness

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$309.43 $299.78

Universal Coil On/Near Plug Harness Γé¼" Use to connect Holley PN 558-312 or factory GM LSx coil harnesses to Holley HP or Dominator ECUs...

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HOLLEY

HOLLEY 558-308 EFI Main Power Harness

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$139.41 $0.00

EFI Wiring Harness - Main Power - Holley Dominator EFI - Each

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Holley

Holley 558-308 Main Power Ignition Harness

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$186.08 $167.40

This Harness is required with HP or Dominator ECUs. Includes, 13 long, 10 AWG main power harness, Qty. (2) 3/8 in. ring terminals and...

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Holley

Holley 558-309 Dis Coil To Lsx Harness Adapter

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$178.89

This kit contains plug-and-play harnesses to connect Holley 24x or 58x main harness to Holley waste-fire DIS coils. Not compatible with 556-112 coil near...

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Holley

Holley 558-310 Gen III HEMI Coil Harness - Early Coils

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$285.32

Chrysler has used two different coils on the HEMI engine series with 2006 being the year that the change was phased throughout the truck...

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Holley

Holley 558-311 Gen III HEMI Coil Harness - Late Coils

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$279.93 $275.89

Chrysler has used two different coils on the HEMI engine series with 2006 being the year that the change was phased throughout the truck...

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HOLLEY

HOLLEY 558-312 HP EFI Sub-Harnesses - Smart Coil

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$368.83 $0.00

EFI Wiring Harness - Smart Coil - Ignition Coil Wiring - Holley HP / Dominator EFI - Universal - Each

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Holley

Holley 558-312 HP Smart Coil Ignition Harness

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$430.15 $387.85

HP Smart Coil ignition sub-harness. Includes a pair of coil harnesses for an 8 cylinder engine. These harnesses are similar in design to factory...

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Holley

Holley 558-314 Ignition Coil Harness

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$348.64

Coil harness for 99-04 2 Valve Ford Modular (4.6 & 5.4L) Engines. Specifications: Description_DEF Ignition Harness Description_DES Holley Ignition Coil Harness Description_FAB Ignition Wiring...

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Holley

Holley 558-315 Ignition Coil Harness

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$286.57

Coil harness for 99-04 4 Valve Ford Modular (4.6 & 5.4L) Engines. Specifications: Description_DEF Ignition Harness Description_DES Holley Ignition Coil Harness Description_INV COIL HARNESS,...

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Holley

Holley 558-317 Ignition Coil Harness

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$330.63

Coil Harness for 2011 to 2015 Ford Coyote (5.0L) Engines Specifications: Description_DEF Ignition Harness Description_DES Holley Ignition Coil Harness Description_KEY harnesses; coyote; 5.0; 5.0L;...

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Holley

Holley 558-318 Coil-Near-Plug Ignition Sub Harness

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$401.73 $391.21

"Big Wire" Sub Harness- pre wired with 12ga power and grounds, for optimal performance! Specifications: Description_DEF Ignition Harness Description_DES Coil-Near-Plug Ignition Sub Harness Description_FAB...

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HOLLEY

HOLLEY 558-318 Coil-Near-Plug Sub Harness - Big Wire

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$377.96 $0.00

Ignition Wiring Harness - Big Wire C-N-P Sub Harness - V8 - Each

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Holley

Holley 558-319 Efi Main Power Harness For Coyote Ti-Vct Applications

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$93.06

Introducing Coyote Twin Independent Variable Cam Timing Control from Holley EFI! Do you have a coyote crate engine going in your dream car Is...

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HOLLEY

HOLLEY 558-321 GM LS Coil Sub Harnesses

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$276.39 $0.00

Ignition Wiring Harness - Factory Replacement - Injector Sub Harness - GM LS-Series - Pair

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Holley

Holley 558-321 LS Ignition Coil Harness

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$293.94

Are you tired of scouring the junkyard for stock ls coil sub harnesses Introducing the new Holley EFI LS Coil Sub Harness. This coil...

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Ford-Coyote-Ti-Vct-Coil-Harness-(2015.5-2017)

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Holley

Holley 558-322 Ford Coyote Ti-VCT Coil Harness (2015.5-2017)

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$361.99

Introducing Coyote Twin Independent Variable Cam Timing Control from Holley EFI! Do you have a coyote crate engine going in your dream car Is...

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Holley

Holley 558-323 Hyperspark Ignition Adapter

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$88.51 $62.51

Designed to plug and play with HyperSpark distributors and Holley EFI main harnesses with an ignition connector, such as part number 558-104. Specifications: Description_DEF...

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HOLLEY

HOLLEY 558-323 Wiring Harness Adapter Hyperspark Ignition

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$64.94 $0.00

EFI Wiring Harness - Ignition Adapter Harness - HyperSpark Distributors to Holley EFI - Each

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Holley

Holley 558-325 Efi Pro-Billet Ignition Adapter

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$75.84 $58.08

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. Specifications:...

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HOLLEY

HOLLEY 558-325 EFI Pro-Billet Ignition Adapter

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$59.14 $0.00

EFI Wiring Harness - Ignition Adapter Harness - MSD Distributors to Holley EFI - Each

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Ls-Coil-Extension-Harnesses,36-Inch-Pair

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Holley

Holley 558-326 LS Coil Extension Harnesses

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$209.00 $185.23

Designed to extend your factory coil harness, allowing you to easily remote mount your LS ignition coils. These 36 in. long ignition coil extension...

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Holley

Holley 558-328 Sniper EFI Hyperspark Harness

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$482.49 $469.88

Our HyperSpark Master Kits were designed to make upgrading your ignition on a Sniper EFI-equipped engine simple. When installed concurrently with a new Sniper...

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Holley

Holley 558-329 Tach Input Ignition Adapter

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$43.90

This is only used on applications using a CD Box, such as an MSD 6AL, while not using timing control. Specifications: Description_ASC Plugs into...

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Holley

Holley 558-330 Tach Input Ignition Adapter

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$54.94 $53.73

This is only used on applications with Pro-Billet Distributor or Magnetic Crank Trigger Specifications: Description_ASC Plugs into the connector labeled "IGNITION" on the main...

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