Holley EFI

Whether your engine has forced induction or is naturally aspirated, these Holley MAP sensors will keep your engine performing at its best. They're available in 1, 2, and 3-bar models.FeaturesDesigned for GM LS Gen III and IV engines equipped with GM...

Unterminated 16 injectors MPFI harness Terminated at injector connectors (Bosch style). Harness must be assembled and require crimping Metripak150 connectors. Includes all connectors, pins, terminals, and loom needed. for HP EFI & Dominator...

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

MULTEC 2 INJECTOR HARNESS - EARLY TRUCKFeaturesBolt on 4150 Flange Carburetor ReplacementSupports up to 650HP with Four 100lb/hr InjectorsTerminator X Max Stealth 4150 kits provide transmission control for Pre-2009 GM 4L60E/4L80E Transmissions (Part...

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.FeaturesDesigned for GM LS Gen III and IV engines equipped with GM LS1/2/6...

Main Engine harness intended for use with Terminator X, X Max, Terminator, HP, and Dominator ECUs when using a Terminator or Terminator Stealth style Throttle Body Injection unit on a Gen 3 24X LS engine. This harness has crank and cam sensor plugs for...

Introducing the Holley EFI Wiring Shop. 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 Holley EFI powered...

The Terminator X Stealth 4500 Air Valves are perfect for Multi-Port Fuel Injection installations that want the look of a 4500 Dominator Carburetor. These 1440 CFM air valves also include a TPS sensor for easy installation on most intake manifold...

Holley EFI 2x4 Dual Plane Intake Manifold, LS Gen 3 LS1/LS2/LS6 enginesFeaturesTake control of your Gen III HEMI with Holley EFI by controlling fuel and spark. Great for power upgrades and engine swaps.Capable of tuning with power adders such as...

An Injector Harness is required and Holley offers two. The harness with USCAR/Stock injector connectors will cover most applications that are using the factory injectors. The other harness is for the Bosch and Holley (or Jetronic/Minitimer) injector...

This kit contains plug-and-play harnesses to connect Holley 24x or 58x main harness to Holley waste-fire DIS coils. Not compatible with 556-112 coil near plug smart coils (see 558-312 for 556-112 smart coil applications )FeaturesBolt on 2x4 4150 Flange...

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 easy access to 12v, 5v Reference, and Sensor Grounds. The Ford MPFI C-O-P Main Harness has also been...