Wiring Harnesses

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Holley EFI

NEW DEVICE TO TWO PIN MAIN HARNESS

$47.22 $41.97

The Holley EFI Can Adapter/Power Harness adapts two pin Holley main harness CAN connectors to new style 4 pin CAN devices.

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Holley EFI

CAN Extension Harness - 9''

$59.95 $52.69

Can Extension Harness (for Racepak and other external CAN drives)

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Holley EFI

Holley EFI GM Drive-By-Wire Harness - Early Truck

$303.95 $269.95

Terminator X Max and Dominator EFI GM DBW Harness-Early Truck. Compatible with GM part number 10379038.

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Holley EFI

CAN EXTENSION HARNESS, 12FT

$88.95 $79.05

CAN Extension Harness (for Racepak and other external CAN drives)

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Holley EFI

10-Pin Harness - Sniper TBI

$66.09

EFI Wiring Harness - Input / Output Harness - Holley Sniper EFI - Each

-7%

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Holley EFI

Universal MPFI Main Harness for HP EFI & Dominator EFI

$595.95 $549.95

Universal MPFI Main Harness for HP EFI & Dominator EFI

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Holley EFI

Universal Unterminated Injector Harness

$254.95 $226.15

Universal Unterminated Injector Harness for HP EFI & Dominator EFI(Bosch EV1 style).

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Holley EFI

Unterminated Universal Main Harness for HP EFI & Dominator EFI

$595.95 $528.95

Unterminated Universal Main Harness for HP EFI & Dominator EFI

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Holley EFI

LS2/3/7+ (58x/4x) Engine Main Harness for HP EFI & Dominator EFI

$712.95 $632.95

This harness has been designed to interface with 58x crank and 4x cam sensors. These engines are commonly found in 2006+ Year Model vehicles...

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Holley EFI

LSx Injector Harness for HP EFI, Dominator EFI and Terminator X.

$201.95 $182.95

LSx Injector Harness for HP EFI, Dominator EFI and Terminator X.

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Holley EFI

Digital Dash I/O Adapter

$178.95 $161.95

Replacement I/O Adapter for Digital Dash.

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Holley EFI

Holley EFI Transmission Control Harness - GM 4L60 (Pre-2009) and 4L80

$337.95 $299.95

Expanding our transmission control options for our EFI systems, this harness provides plug and play for Pre-2009 GM 4L60 and 4L80 transmissions using a...

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Holley EFI

Holley EFI GM Drive-By-Wire Harness

$281.95 $249.95

Dominator EFI GM Drive-By-Wire Harness

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Holley EFI

CAN Extension Harness - 8'

$74.95 $65.85

Can Extension Harness (for Racepak and other external CAN drives)

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Holley EFI

V8 over Manifold, Bosch Style Injector Harness

$224.95 $199.95

V8 over Manifold, Bosch Style Connector Harness for Avenger EFI, HP EFI, Dominator EFI and Terminator X. GM / Chrysler Cylinder Orientation

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Holley EFI

Firmware Updating - Dash Configuration - ECU Testing

$260.95 $231.95

Also includes a power switch for quick setup in your workspace. Power and Ground flying leads need to be connected to your battery or...

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Holley EFI

LS1/6 Main Harness for HP EFI & Dominator EFI

$712.95 $649.95

This harness is designed for LS1/6 Engines, from 1997-2004. This harness interfaces with 24x Crank and 1x Cam sensors.

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Holley EFI

Dominator EFI Connector J2B Auxiliary Harness

$197.95 $175.95

Dominator EFI Connector J2B Auxiliary Harness

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Holley EFI

Delphi M/P 150 to GT MAP Adapter Harness

$40.50 $36.00

These two new MAP sensor adapters from Holley EFI allow you to quickly add a stainless steel MAP sensor to your existing installation. Holley...

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Holley EFI

For Dominator, HP, Terminator X and Terminator X Max

$143.95 $130.95

This harness connects to the (8) pin Metri-Pack Input/Output connector located in most Holley EFI main harnesses.

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Holley EFI

Digital Dash I/O Adapter with unterminated Vehicle Harness

$393.95 $357.95

Digital Dash I/O Adapter with unterminated Vehicle Harness

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Holley EFI

Dominator EFI Connector J2A Auxiliary Harness

$257.95 $228.95

Used when adding a second wide band oxygen sensor to a Dominator EFI installation.

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Holley EFI

LS COIL HARNESSES

$224.95 $199.95

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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Holley EFI

Holley EFI LS Main Harness to LS3-style MAP Sensor Adapter

$45.24 $40.21

Holley EFI LS main harnesses have a MAP sensor connecter designed for use with an LS1/2 style MAP sensor. The 558-416 is an adapter...

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Holley EFI

7-Pin Main Harness - Sniper TBI

$168.95

EFI Wiring Harness - Main Battery Harness - Fuse / Fuel Pump Relays - Kit

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Holley EFI

Terminator EFI Input/Output Kit

$59.95 $52.69

PN 558-420 contains 5 extra input/output wires that the base Terminator EFI harness does not contain. It contains Input wires for Inputs 1-4. It...

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Holley EFI

Use with Terminator X or Terminator X Max Only

$184.95 $163.95

2009+ Gen III Hemi engines rolled off the showroom floor with Variable Valve Timing (VVT). Now, both Terminator X and Terminator X Max ECUs...

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Holley EFI

Developed specifically for Holley EFI analog CAN gauges

$168.95 $149.95

User can daisy chain as many gauges as they choose with all gauge data supplied through a one wire ECU connection. One plug and...

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Holley EFI

Holley EFI Pro-Billet Ignition Adapter

$44.43 $39.49

Designed to plug and play with MSD Pro Billet distributors and Holley EFI main harnesses with an ignition connector, such as Holley part number...

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Holley EFI

For use with Holley® HP and Dominator ECUs and other EFI systems

$314.95 $286.95

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

HyperSpark Ignition Adapter

$51.85 $47.24

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

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Holley EFI

Holley EFI Pro Dash Input/Output Harness

$311.95 $276.95

This wiring kit is intended to fully populate all of the inputs and outputs for part numbers 553-111 and 553-112 Pro Dashes. These can...

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Holley EFI

“Big Wire” C-N-P Ignition Sub Harness

$322.95 $286.95

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

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Holley EFI

Pre-Terminated J1A / J1B 15' Flying Lead Main Harness

$479.95 $425.95

The unterminated main harness comes with both J1A and J1B connectors full terminated with 15' of flying lead wiring.

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Holley EFI

Crank/Cam Ign. Harness. Fully terminated harness.

$112.95 $99.95

Crank/Cam Ign. Harness for Ferrous Crank/Magnetic Cam Hall Effect Sensors. Fully terminated harness.

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Holley EFI

Universal MPFI Coil On Plug Main Harness

$674.95 $599.95

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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