Holley EFI

Have been hesitant on switching to EFI because you like the traditional look of a carburetor? There is no more need to worry! Holley has you covered with the new Terminator Stealth Throttle Body Fuel injection System. Now you can have all of the...

Introducing EFI Engine Connector Kits – From Holley EFI. With the latest addition to our ever-expanding Wiring Shop, our goal was to provide you with every engine connector used on the Holley EFI main harnesses. If you are building a custom engine...

This cast EFI intake elbow allows the use of GM LS 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 forward, sideways,...

Introducing J1A through J4 Connectors Kits so you no longer have to buy a complete connector kit if you only need one I/O connector

Introducing the Holley EFI Programmable 8 Channel Injector Driver Module. The ultimate solution for methanol burning engines that require a large set of secondary injectors. The Holley EFI Injector Driver Module will have you in complete control of your...

If you're thinking of building either a high performance or race multi-point fuel Injection system for your engine, look no further than Holley for the throttle body. Holley offers a line of universal throttle bodies that range in sizes from 1000 CFM to...

The Modular Mid-Rise intake utilizes the popular Holley LS3/L92 rectangle port Mid-Rise intake manifold along with a purpose built plenum base adapter and a Holley 92MM EFI plenum top which converts it into a Mid-Rise EFI intake manifold. With a max...

This fuel rail kit is specifically designed to work with the Holley GM 2x4 dual plane manifold. Working to utilize the technology of the LS pushrod engine and now mated with the impressive multi-carb looks and performance of the muscle car era in the...

GM 4L60/80E Transmission Harness - Complete terminated harness with j4 connector to operate GM electronic transmissions. for Dominator EFIFeaturesBase Plenum Top Mounting Flange Height – 8.42” to the lifter valley cover flange on engine block.Total...

Introducing J1A through J4 Connectors Kits so you no longer have to buy a complete connector kit if you only need one I/O connector

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,...

Introducing Coyote Twin Independent Variable Cam Timing Control from Holley EFI! Do you have a coyote crate engine going in your dream car? Is your weekend road race warrior powered by a coyote junkyard engine with locked cams? Unlock the full potential...