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Harness the power and exceptional drivability of fuel injection for your ride. Our selection of fuel injection wiring harnesses makes it easy to bring throttle body,...
Harness the power and exceptional drivability of fuel injection for your ride. Our selection of fuel injection wiring harnesses makes it easy to bring throttle body, multi-port, or sequential multi-port fuel injection to your vehicle. Whether you’re adding an aftermarket fuel injection system to your existing engine, swapping in a completely new fuel-injected engine, or just replacing old wiring, we’ve got what you need. We carry complete EFI wiring harnesses from Holley, FAST, Ron Francis Wiring, Accel, Painless Performance, and many others. Bring fuel injection to darn near anything—vintage hot rods,...
Harness the power and exceptional drivability of fuel injection for your ride. Our selection of fuel injection wiring harnesses makes it easy to bring throttle body, multi-port, or sequential multi-port fuel injection to your vehicle. Whether you’re adding an aftermarket fuel injection system to your existing engine, swapping in a completely new fuel-injected engine, or just replacing old wiring, we’ve got what you need. We carry complete EFI wiring harnesses from Holley, FAST, Ron Francis Wiring, Accel, Painless Performance, and many others. Bring fuel injection to darn near anything—vintage hot rods, street rods, replica cars, or whatever—with fuel injection system wiring harnesses from Summit Racing.
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These Holley replacement fuel injector wiring harnesses are replacements for the 8-cylinder injector harnesses. They connect the main harness to the injectors, routing the wires over the rail and making replacement a snap!
( 14 )
$43.73
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$999.95
Holley offers a variety of direct replacement EFI wiring harnesses, including multi-port, sequential, and throttle body injection styles. These units are made with premium components to ensure better reliability and performance for your ride--and they're compatible with many engine swaps. Holley EFI systems wiring harnesses are sold individually or as a kit; choose the model needed for your fuel injection application.
( 31 )
$99.95
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$3,299.95
For maximum power with exceptional drivability, transplant the power of fuel injection into your vehicle with Painless Performance fuel injection harnesses. All kits include straightforward instructions and TXL high-temperature, color-coded, and labeled wire for ease of installation. All fuel injection harnesses are 100 percent quality-tested on OmniScanners to ensure the viability of the circuits. Harnesses for both GM and Ford applications are available and they use genuine original equipment connectors for trouble-free installation and operation.
( 93 )
$52.99
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$1,299.99
Holley EFI CAN splitters enable you to add an additional CAN device to your Holley or Sniper EFI systems, without the need to unplug the handheld. This easy-to-install wiring harness simply plugs into the CAN connector on your main harness—then lets you plug in any Holley EFI CAN device, such as a digital dash or USB to the CAN communication cable. Boost the versatility of your fuel injection wiring with Holley splitters.
( 9 )
$45.98
An LS engine swap is a no-brainer when it comes to adding some affordable horsepower to a project car. Unfortunately, any swap comes with its share of headaches, including wiring—and that's where Top Street Performance standalone fuel injection wiring harnesses come in. TSP offers three harnesses for drive-by-wire/drive-by-cable applications and they include a fuse block and all the connectors for a headache-free install. Order the harness recommended for your system.
Not Yet Reviewed
$444.44
Holley has put together a choice of several Dominator EFI auxiliary harnesses. These kits include the loose wires, connectors, inputs, and outputs needed to configure and customize your Dominator EFI system to meet your performance needs.
( 7 )
$175.95
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$228.95
Holley main power ignition harnesses are designed for use with your Holly EFI systems. These wiring harnesses work with other Holley components to correctly configure your EFI system.
( 1 )
$60.35
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$104.95
These Holley Sniper 2 EFI PDM main harnesses includes the switched 12V power wire, main battery power and ground, coil input wire, and HyperSpark distributor connector. They feature a braided split wire loom to keep the wires protected and your engine bay clean! They are intended to be used on applications with a PDM, and do not include a fuel pump relay. Holley Sniper 2 EFI PDM main harnesses include: * One 5 ft. 12 gauge main battery power wire * One 5 ft. 12 gauge main battery ground wire * One 30 amp fuse * One 20 ft. 20 gauge fuel pump trigger wire * One 3 ft. 20 gauge coil input wire * One 5 ft. 20 gauge switch 12V ignition wire
( 2 )
$145.95
Holley Sniper HyperSpark plug-and-play main wiring harnesses were designed to make upgrading your ignition on a Sniper EFI-equipped engine easy. When this harness is installed concurrently with a new Sniper EFI system, the combination creates the easiest to install EFI conversion on the market—only four flying lead connections required! Key features: * Harness only requires one connection to a switched power source, battery positive, battery negative, and fuel pump power * Pre-terminated connectors and a built in 40A relay provides power to all of the components within the system * With the included Sniper EFI main harness, you no longer need to run multiple wires to provide switched power for each individual component, which not only helps prevent wiring confusion, but it will also speed up your install time and clean up your engine bay * Just route the harness and pre-terminated connectors to your HyperSpark coil, distributor, and ignition box and plug them in
( 2 )
$320.95
Holley Sniper EFI main wiring harnesses include the switched 12 V power wire, main battery power and ground, fuel pump relay, coil input wire, and magnetic distributor input wire. These kits also include 6 ft. of 3/8 in. black braided split wire loom to keep the wires clean and protected from abrasion. Includes: * 5 ft. of 12-gauge main battery power wire * 5 ft. of 12-gauge main battery ground wire * 30 amp fuse and cover with mounting tab * 40 amp 5-pole relay with mounting tab * 20 ft. of 12-gauge fuel pump 12 V power wire * 3 ft. of 20-gauge crank signal positive wire * 3 ft. 20-gauge crank signal negative wire * 3 ft. 20-gauge coil input wire * 5 ft. 20-gauge switch 12 V ignition wire
( 1 )
$164.95
Holley J1A/B Dominator auxiliary wiring harnesses are designed to connect into the main harness input/ouput connector. They feature loose lead wires on one end and an 8-pin Metri-Pack connector on the other.
( 3 )
$127.95
Holley Sniper EFI input/output wiring harnesses give you the access to two ground trigger inputs and three ground trigger outputs. These harnesses also include the points output, tachometer output, and digital gauge output wires. The input grounds can be used for things, such as A/C kick-on and nitrous stage activation! The output grounds can be used for electronic fan control, or A/C shutdown at wide open throttle. Features: * Wires are individually labeled for easy identification * Two 3 ft. long inputs wires * One 3 ft. long output wire * Two 5 ft. long output wires * One 5 ft. tachometer output * One 3 ft. points output wire * One 5 ft. long digital gauge output for Holley EFI analog gauges
Not Yet Reviewed
$64.49
Boost the versatility of your fuel injection wiring with Summit Racing™ EFI CAN splitters. Offered in different lengths, our easy-to-install Y-splitter harnesses plug into the CAN connector of your main harness then plug into any CAN device, such as a digital dash.
( 2 )
$26.99
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$31.99
For an uncluttered, hassle-free LT engine swap, Holley EFI Terminator X drive-by-wire throttle body wiring harnesses are the solution. Designed for Gen V LTx throttle bodies and Terminator X and X Max ECUs, the harnesses are built with pre-terminated ends to make your install easier. Build your project to take advantage of DBW benefits with the help of Holley EFI's drive-by-wire throttle body wiring harnesses.
Not Yet Reviewed
$279.95
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$283.95
Holley Sniper 2 EFI main wiring harnesses include the switched 12 V power wire, main battery power and ground, fuel pump relay, coil - input wire, and HyperSpark distributor connector. This harness is braided split-wire loom to keep the wires protected and your engine bay clean! Holley Sniper 2 EFI main wiring harnesses feature: * One 5 ft. 12 gauge main battery power wire * One 5 ft. 12 gauge main battery ground wire * One 30 amp fuse with cover with mounting tab for a secure installation * One 40 amp 5-pole relay with mounting tab for a secure installation * One 20 ft. 12 gauge fuel pump 12 V power wire * One 3 ft. 20 gauge coil input wire * One 5 ft. 20 gauge switch 12 V ignition wire
( 1 )
$212.95
Summit Racing™ GM flex fuel sensor harnesses are assembled with OEM tooling, OEM Delphi (connector, lock, seals, and terminals), and use OEM harness wire colors. They're compatible with 2012 and newer GM LS Series engines.
Not Yet Reviewed
$10.99
Holley Sniper EFI dual sync distributor adapter harnesses ensure your Sniper EFI ignition installation is a snap. Simply plug up both connectors, terminate the pink wire to a switched 12 V ignition source, and you're finished.
Not Yet Reviewed
$46.86
Holley Terminator EFI wiring harnesses are replacement throttle body wiring harnesses and engine control wiring harnesses for specific Electronic Fuel Injection kits. These relays allow you to perform functions and features that are programmed with your Holley EFI laptop software. The software also contains instructions on how to program them. Holley wiring accessories give you the expertise needed to get the job done right.
( 2 )
$52.69
Holley EFI CAN adapter harnesses are available in several options. Offered are male to female harnesses in several lengths for Racepak and other external CAN devices, harnesses that adapt 2-pin Holley main harness CAN connectors to newer 4-pin CAN devices, and kits that directly connect Racepak Vnet/Holley to either the J1A (HP and Dominator ECUs) or J3 (Dominator ECU only) connectors. Create secure connections with genuine Holley EFI CAN adapter harnesses.
Not Yet Reviewed
$41.97
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$52.69
Holley Pro Dash input/output wiring harnesses are intended to fully populate all of the inputs and outputs for Holley Pro Dashes. The wire is 20-gauge TXL with TE Superseal pins crimped on every wire and cable, and can easily be inserted into the existing 34-pin dash connectors. Holley Pro Dash wiring harnesses contain loose wires, 2 and 3 jacketed conductor cables, and extra pins that can be used (likely needed when using the jacketed cable for more than one sensor). You can choose to match the color and functions given in the instructions for consistent installations. Content specifics: * 17 loose wires, each 10 ft. in length, various colors with crimped tyco pins * 2-conductor cable, black/blue, 20 ft. * 3-conductor cable, orange/green/black, 40 ft. * Superseal pins and plugs, 20 of each
( 1 )
$276.95
Holley Sniper 2 EFI input/output wiring harnesses give you access to two ground trigger inputs, two ground trigger outputs, the points output, tachometer output, and digital gauge output wires. The input grounds can be used for things such as AC Kick and nitrous stage activation. The output grounds can be used for electronic fan control, or A/C shutdown at WOT. This harness includes an additional 0-5 V TPS output commonly used for transmission control units, and a tach output wire to drive most common aftermarket tachometers. Additional details: * Wires come individually labeled for easy identification * 4 x 5 ft. long output wires * 2 x 5 ft. long input wires
( 4 )
$44.85
Holley GM distributor wiring harness adapters are designed to connect the distributor to the Holley ECU. They fit all digital interactive Holley Pro-Jection and Commander 950 fuel injection systems. The harness adapters will allow the use of the ignition control feature that is part of the Holley ECU.
( 2 )
$59.25
Holley EFI Terminator stealth main wiring harnesses are the direct connection for Terminator Stealth EFI systems. They are also perfect for anyone wanting to convert their 2 x 4 supercharged combo over to EFI. These harnesses are plug-and-play, provide a clean finished appearance, and allow for a quick install.
Not Yet Reviewed
$499.95
The Detail Zone offers EFI wiring for your Cobra replicas, hot rods, and street rods. Their Ford 5.0 EFI universal fit wiring systems are stand-alone Ford fuel injection harnesses that come partially pre-wrapped. These semi-finished harnesses come with enough high-temperature zip loom and harness wrap tape to complete the job, once you verify lengths and layout. Detail Zone Ford 5.0 universal systems work with mass airflow equipped 302 and 351 engines, and where the ECM is placed behind the dash. The systems include a firewall grommet and complete instructions. Do you want fuel injection for your kit car or hot rod? Try Ford 5.0 EFI universal fit wiring systems from The Detail Zone.
( 15 )
$651.65
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