All Products

Holley's BILLET LS Throttle Bodies are the BIGGEST BORE - MOST FEATURE LOADED available. Holley went back to the drawing board and built the ultimate air valve for your LS engine! This all new design boasts a huge 105 millimeter bore for when WOT ...

These machined billet aluminum EFI intake elbows allow the use of GM LS throttle bodies on any intake manifold w/ the 4500 mounting flange. Our design incorporates an optimized transition from the throttle body to the intake plenum for maximum air...

These machined billet aluminum EFI intake elbows allow the use of GM LS throttle bodies on any intake manifold w/ the 4500 mounting flange. Our design incorporates an optimized transition from the throttle body to the intake plenum for maximum air...

Holley's BILLET LS Throttle Bodies are the MOST FEATURE LOADED available. Holley went back to the drawing board and built the ultimate air valve for your LS engine! The 112-589 throttle body features a 90 millimeter bore and a low RPM drive friend...

Holley's BILLET LS Throttle Bodies are the BIGGEST BORE (in the 90 to 95mm category) - MOST FEATURE LOADED available. Holley went back to the drawing board and built the ultimate air valve for your LS engine! This all new design boasts a 95 millim...

The P/N 300-630 & 300-630BK Lo-Ram 105 mm billet throttle body adapters are designed as part of the Holley LS front-feed Lo-Ram EFI intake manifold kits. It is commonly known billet is the best. The strength and rigidity of these components i...

Dress up and open up your ZL1, CTS-V, or ZR-1 with Holley Hi-Flow Fuel rails. The bright dip, black anodized rails come with laser etched EFI logo for long-lasting good looks and are a direct replacement for the rails on the factory blower or any...

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...

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...

These cast aluminum EFI intake elbows allow the use of GM LS throttle bodies on any intake manifold w/ the 4500 mounting flange. Our design incorporates an optimized transition from the throttle body to the intake plenum for maximum airflow and di...

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...

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...

Required when upgrading to (EV1/Bosch style) performance injectors on OE truck manifoldsSpecs: Brand: Holley EFI Category: Air and Fuel Delivery Color: Black Emission Code: 5 Grade Type: Performance Material: Steel Part Type: Fuel Injector ...

"Big Wire" Sub Harness- pre wired with 12ga power and grounds, for optimal performance!Features:“Big Wire” Sub Harness- Pre wired with 12ga Power and Grounds, for optimal performance!Specs: Brand: Holley EFI Category: Ignition Emission Code: 4 ...

Specifically designed for use w/ JESEL and similar external, dry timing-belt, cam drive systems. Includes 3 wire hall-effect sensor (8-20 volts), anodized billet aluminum bracket, mounting hardware, mating connector, and stainless steel 1/4"-20 "f...

Specifically designed for use w/ JESEL and similar external, dry timing-belt, cam drive systems. Includes 3 wire hall-effect sensor (8-20 volts), anodized billet aluminum bracket, mounting hardware, mating connector, and stainless steel 1/4"-20 "f...

A cam sync signal is required to run sequential fuel injection. This tells the ECU which cylinder is cylinder #1 (or the first cylinder in the firing order as entered in the software).These kits were specifically designed to provide a "plug-&-...

Specifically designed for use w/ JESEL and similar external, dry timing-belt, cam drive systems. Includes 3 wire hall-effect sensor (8-20 volts), anodized billet aluminum bracket, mounting hardware, mating connector, and stainless steel 1/4"-20 "f...

Simpson Racing harnesses are built for the fearless right here in New Braunfels, Texas. Featuring CAMFX snap-in attachments, lightweight 2" belt webbing, and all-black hardware, the Simpson CAMFX harnesses are comfortable and easy to use. The 2" s...

Holley EFI Cam Sync Signal is designed to generate a cam sync input signal to the ECU when used in flying magnet cam trigger setups. This sensor is a Hall Effect sensor, meaning it outputs a square wave signal, which is ideal for use with most ele...

Cam Sync Sensor Kit; Complete with Cam Sync Flying Magnet Target and Hall Effect Cam Sync Sensor; M12x1Features: 3 wire hall-effect camshaft sensor, generates digital square-wave signal Includes stainless steel flying magnet target w/ 1/4”-20 x 3/...

12" Male to Female CAN Adapter Harness (for Racepak and other external CAN devices)Specs: Brand: Holley EFI Category: Air and Fuel Delivery Emission Code: 5 Part Type: Fuel Injection Harness Product Type: CAN Extension Harness Sub Category: ...

12 feet long Male to Female CAN Adapter Harness (for Racepak and other external CAN devices)Features: 12' (2) connectors Wires in protective sleeve For external drivers (ideal for Racepak) Specs: Brand: Holley EFI Category: Air and Fuel Delivery...

4" Male to Female CAN Adapter Harness (for Racepak and other external CAN devices)Specs: Brand: Holley EFI Category: Air and Fuel Delivery Emission Code: 5 Part Type: Fuel Injection Harness Product Type: CAN Extension Harness Sub Category: W...