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Holley EFI Wiring Shop just keeps getting better! We have one goal, to provide you a one stop solution for all of your wiring components needs. From connectors and pins to wire loom and tools! We have everything you need to build or service your H...

Holley EFI Wiring Shop just keeps getting better! We have one goal, to provide you a one stop solution for all of your wiring components needs. From connectors and pins to wire loom and tools! We have everything you need to build or service your H...

An EFI system depends heavily on being supplied a clean and constant voltage source. The grounds of an electrical system are just as important as the power side. Our Holley EFI Harness Kit comes complete with the main harness, power harness and in...

An EFI system depends heavily on being supplied a clean and constant voltage source. The grounds of an electrical system are just as important as the power side. Our Holley EFI Harness Kit for your GM LS engine comes complete with the main harness...

GM 4L60/80E Transmission Harness - Complete terminated harness with j4 connector to operate GM electronic transmissions.For 2009+ GM 4L60/80E Transmission use Holley EFI Part Number 558-455.Specs: Brand: Holley EFI Category: Air and Fuel Deliver...

Similar to the changes with the cam and crank sensors, the Drive-By-Wire throttle pedal connector was changed in 2008 on cars while the trucks changed in the 2007 models. Interestingly, the throttle body connector is consistent on all engines. The...

Our fuel rail kit allows dual -8AN feeds to keep up with fueling demands with fuels like E85, E98, M1, and the like.This kit will also allow you to run both rails to a single high-flow fuel pressure regulator for complete control over your fuel sy...

Required when directly connecting Holley fuel rails to GM factory fuel line quick-connect. Includes (1) 3/4-16 O-ring port plug and (1) -6 to GM quick connect adapter.Specs: Brand: Holley EFI Category: Air and Fuel Delivery Color: Black Emissi...

10 micron post filter with dual 3/8" barbs.Specs: Brand: Holley EFI Category: Air and Fuel Delivery Emission Code: 5 End 1 Gender: Male End 1 Port Outside Diameter: 2024-03-08 End 2 Gender: Male End 2 Port Outside Diameter: 2024-03-08 Fitt...

This wiring harness interfaces a Holley EFI ECU to a 2V Modular Ford engine. It is meant to be used in conjunction with an injector harness, a coil harness, and ignition modules. Most stock sensors are used with this harness.Features: 1999-2004 Fo...

These manifolds are designed for 2011-2023 Ford 5.0L high performance engines with cylinder heads that have an OEM type mounting pattern and port dimensions. These kits include fuel rails for use with OEM type fuel injectors and will not accept mo...

These manifolds are designed for 2011-2023 Ford 5.0L high performance engines with cylinder heads that have an OEM type mounting pattern and port dimensions. These kits include fuel rails for use with OEM type fuel injectors and will not accept mo...

The new Hi-Flow billet fuel rails are a direct fit for the Ford 7.3L Godzilla engines. The fuel rails feature a 5/8" diameter fuel passage that provides more flow capacity for higher horsepower applications versus stock rails. The black anodized r...

Coil harness for 99-04 4 Valve Ford Modular (4.6 and 5.4L) engines.Specs: Brand: Holley EFI Category: Air and Fuel Delivery Emission Code: 4 Grade Type: Performance Harness Application: Ford Harness Type: Ignition Tech Resources:

This cast EFI intake elbow allows the use of Ford throttle bodies on any intake manifold w/ the 4150 mounting flange. Slotted mounting holes & dual throttle cable mounting bracket bosses allow the elbow & throttle body to be mounted forwa...

Dominator® EFI Vehicle Management Systems are intended for non-emissions street and racing engine applications. In addition to the transmission control, drive by wire, and dual wideband oxygen sensor options, Dominator® systems have nearly unlimit...

I/O Adapter w/Terminated Vehicle HarnessFeatures: Provides (10) addiitonal inputs/outputs to the 7" digital dash Brings out connections to a waterproof 26 pin connector similiar to ones used on EFI units Includes USB memory stick to update digital...

These two new MAP sensor adapters from Holley EFI allow you to quickly add a stainless steel MAP sensor to your existing installation. Holley part #558-466 adapts harnesses with a (MPFI) Weatherpack 3-pin connector to the 3-pin Delphi GT connector...

The brushed aluminum universal mount dash bezel for the Holley 7 inch dash is made of UV resistant composite for durability. The overall dimensions are 12 x 21 inches to allow you to trim to fit your application.Features: Made of UV-resistant ABS ...

This harness connects to the (8) pin Metri-Pack Input/Output connector located in most Holley EFI main harnesses.Features: (8) Metri-Pack pins (4) Input Wires (4) Output Wires Assorted wire colors Specs: Brand: Holley EFI Category: Ignition Emi...

This coil is designed for use with Holley HP and Dominator ECU's, 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.Feature...

This electromagnetic valve meters fuel into the intake manifold proportional to the air being induced into the engine. When the valve is energized, the electromagnetic force generated by the solenoid lifts the pintle/ball from the seat. Fuel under...

Replacement Wideband Oxygen Sensor for Commander 950 wideband controller kits.Features: Replacement/Service part Commander 950 Bosch Black connector color Specs: Band Type: Wide Brand: Holley EFI Category: Air and Fuel Delivery Connector Gende...

Our fuel rail kit allows dual -8AN feeds to keep up with fueling demands with fuels like E85, E98, M1, and the like.This kit will also allow you to run both rails to a single high-flow fuel pressure regulator for complete control over your fuel sy...