Ignition Harness

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Holley EFI

Sniper 2 Pro Billet Ignition Adapter

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$47.06 $44.71

Provide RPM signal to the ECU for your Sniper 2 while using timing control. With two wires, it's quick and easy to install in...

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Holley EFI

HyperSpark Ignition Adapter

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$56.19 $53.38

Designed to plug and play with HyperSpark distributors and Holley EFI main harnesses with ignition connector.

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Holley EFI

Gen III HEMI Coil Harness - Late Coils

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$233.95 $222.25

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 EFI

HP Smart Coil Ignition Harness

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$337.95 $321.05

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 EFI

C-N-P Ignition Sub Harness

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$343.95 $326.75

"Big Wire" Sub Harness- pre wired with 12ga power and grounds, for optimal performance!

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Holley EFI

Hemi Drive-By-Wire Throttle Body Harness

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$139.95 $132.95

The Holley Dominator ECU has built in capability to control the Drive-By-Wire throttle pedals and throttle bodies used on most Chrysler HEMI applications.

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Holley EFI

Ford 4V Modular Coil Harness

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$247.95 $235.55

Coil harness for 99-04 4 Valve Ford Modular (4.6 and 5.4L) engines.

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Holley EFI

Ford Coyote Coil Harness

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$263.95 $250.75

Coil Harness for 2011 to 2015 Ford Coyote (5.0L) Engines

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Holley EFI

Ford TFI Ignition Harness

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$150.95 $143.40

Ford TFI Ignition Harness for Avenger EFI, HP EFI & Dominator EFI

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Holley EFI

Universal Unterminated Ignition Harness

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$219.95 $208.95

Universal Unterminated Ignition Harness for HP EFI & Dominator EFI

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Holley EFI

Universal Coil On/Near Plug Harness

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$224.95 $213.70

Universal Coil On/Near Plug Harness – Use to connect Holley PN 558-312 or factory GM LSx coil harnesses to Holley HP or Dominator ECU's

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Holley EFI

Main Power Harness

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$124.95 $118.70

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

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Holley EFI

Gen III HEMI Coil Harness - Early Coils

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$224.95 $213.70

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 EFI

Dominator EFI Auxiliary Harness

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$268.95 $255.50

J4 ECU Connector 26 User Programmable Inputs and Outputs

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Holley EFI

Ford Modular 2V and 4V Main Harness for use with Holley Smart Coils

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$1,068.95 $1,015.50

Main Harness for 99-04 2 & 4 Valve Ford Modular (4.6 & 5.4L) Engines for use with Holley Smart Coils

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Holley EFI

Universal MPFI Coil On Plug Main Harness

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$701.95 $666.85

This harness provides a plug and play upgrade solution for those seeking to convert to Coil-On-Plug. Additionally we have pre-installed a Power Tap for...

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Holley EFI

Ford MPFI Coil On Plug Main Harness

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$760.95 $722.90

This harness provides a plug and play upgrade solution for those seeking to convert to Coil-On-Plug. Additionally we have pre-installed a Power Tap for...

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Holley EFI

HEI GM Small Cap Ignition Harness

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$71.95 $68.35

HEI Ignition Harness for Avenger EFI, HP EFI & Dominator EFI

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Holley EFI

Crank/Cam Ign. Harness. Fully terminated harness.

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$116.95 $111.10

This fully terminated harness is compatible with HP and Dominator ECU's and is plug and play w/ the following products: 554-118-HALL EFFECT CRANK TRIGGER...

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Holley Sniper EFI

HyperSpark Plug and Play Main Harness

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$383.95 $364.75

With our HyperSpark plug and play main harness, you replace the Sniper 1 main harness and use the new harness to connect your HyperSpark...

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Holley Sniper EFI

Sniper EFI HyperSpark Ignition Box Service Harness

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$40.33 $38.31

This harness includes switched 12V, battery+, battery-, ignition coil wire, and output wires for points or electronic ignition amplifier. Harness is wrapped in protective...