Components

The eight channel coil driver module is a "dumb coil" driver module that plugs into the main harness, which is needed when running the factory coils. Contains two 4-channel drivers, requires on an eight cylinder engine.Features:Eight channelDrives two wire “Dumb Coils”Potted design allows installation in engine compartmentContains two 4-channel driversPlug and Play with 558-314, 558-315 and 558-31..

The four channel coil driver module is a "dumb coil" driver module that plugs into the main harness, which is needed when running the factory coils. Contains one 4-channel driver.Features:Four channelPotted design allows installation in engine compartmentBrandHolley EFIEmission Code5Product TypeHigh Current Driver - ModulePart Number554-123..

Have you been searching for a reason to discard your old noisy mechanical speedometer cable? If so, the Holley GPS Module for our 7" Digital displays should be the next addition to your project vehicle. Featuring a simple plug and play installation, this GPS Module will allow you to display vehicle speed on your digital dash, without needing any external sensor information.Features:USB connection ..

This coil is designed for use with Holley® HP and Dominator ECUs, as well other EFI systems that can drive "smart" ignition coils. Although it is designed for high powered race applications, it can be used on street driven vehicles as well.Features:Peak Voltage – 44,000 VoltsPeak Output – 102 MjMaximum Battery Voltage 17.0 VoltsIncludes mating connector and pinsBrandHolley EFIEmission Code4Height1..

Holley's EFI Crank Trigger Kit is engineered to provide an accurate crank speed & position signal to Holley EFI systems in the most-demanding, high horsepower, racing applications. Crank position is measured every 10 degrees as opposed to every 45 degrees for a standard 4-Magnet, MSD "style" Crank trigger.Features:8” diameter, 1/4” thick, billet steel, 36-1 tooth, crank wheel with Black Zinc Oxide..

Holley's EFI Crank Trigger Kit is engineered to provide an accurate crank speed & position signal to Holley EFI systems in the most-demanding, high horsepower, racing applications. Crank position is measured every 10 degrees as opposed to every 45 degrees for a standard 4-Magnet, MSD "style" Crank trigger.Features:7.25” diameter, 1/4” thick, billet steel, 36-1 tooth, crank wheel with Black Zinc Ox..

Main harness for 99-04 2 & 4 Valve Ford Modular (4.6 & 5.4L) Engines.BrandHolley EFIEmission Code4Harness ApplicationFordHarness TypeMainProduct TypeFord Modular Main Engine HarnessPart Number558-108..

Ford V8 Injector Harness for Ford USCAR / EV6 style Fuel Injectors (Evenly Spaced)BrandHolley EFIEmission Code3Harness ApplicationFordHarness TypeInjectorProduct TypeFord EV6 Style Injector HarnessPart Number558-212..

Ford V8 Injector Harness for Jetronic "Bosch" style Fuel Injectors (Evenly Spaced)BrandHolley EFIEmission Code3Harness ApplicationFordHarness TypeInjectorProduct TypeFord EV1 Style Injector HarnessPart Number558-213..

Coil harness for 99-04 2 Valve Ford Modular (4.6 & 5.4L) Engines. BrandHolley EFIEmission Code4Harness ApplicationFordHarness TypeIgnitionProduct TypeFord Modular Coil HarnessPart Number558-314..

Coil harness for 99-04 4 Valve Ford Modular (4.6 & 5.4L) Engines. BrandHolley EFIEmission Code4Harness ApplicationFordHarness TypeIgnitionProduct TypeFord Modular Coil HarnessPart Number558-315..

Coil Harness for 2011 to 2015 Ford Coyote (5.0L) EnginesBrandHolley EFIEmission Code4Harness ApplicationFordHarness TypeIgnitionProduct TypeFord Modular Coil HarnessPart Number558-317..

BrandHolley EFIEmission Code3Harness TypeAuxiliaryProduct TypeJ1 Auxillary Input/ Output Harness - ConnectorPart Number558-400..

Used when adding a second wide band oxygen sensor to a Dominator EFI installation. Features:J2A Connector#2 Wide band oxygen sensor harness (Fully Terminated)23 user programmable input wires with pre-crimped ECU pinsBrandHolley EFIEmission Code3Harness TypeAuxiliaryProduct TypeJ2 Auxiliary Input/ Output Harness - ConnectorPart Number558-401..

BrandHolley EFIEmission Code3Harness TypeAuxiliaryProduct TypeJ2 Auxiliary Input/ Output Harness - ConnectorPart Number558-402..

BrandHolley EFIEmission Code3Harness TypeAuxiliaryProduct TypeJ3 Auxiliary Input/ Output Harness - ConnectorPart Number558-403..

BrandHolley EFIEmission Code3Harness TypeAuxiliaryProduct TypeJ4 Auxiliary Input/ Output Harness - ConnectorPart Number558-4043This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles.The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:1965 and older U.S. manufactured California Certified vehicles1967 an..

7' long sealed USB data cable. This cable is included with the purchase of an HP or Dominator ECU.BrandHolley EFIEmission Code5Harness TypeAuxiliaryLength7'Product TypeUSB Data - Communication CablePart Number558-409..

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 contains one wire for Output 2. These inputs and outputs can perform features and functions that must be programmed via Holley EFI laptop software. The software also contains instructions on how to program these.BrandHolley EFIEmission Code5Harness TypeAu..

Replacement I/O Adapter for Digital Dash BrandHolley EFIEmission Code5Product TypeDigital Dash Harness / Adapter / ModulePart Number558-432..