Fuel Systems

* Holley EFI industry-leading, easy-to-use software suite allows full laptop access for advanced users* Real-time fuel map learn—takes the guesswork out of tuning your base fuel table* High-impedance injector drivers will safely power most standard...

Bought new injectors for your fuel rail, but forgot to look at what kind of plugs they take - never fear! We have you covered! Adapt your injectors to your harness in a clean and neat fashion. So if you have the following injectors and the following...

Fuel Rail Material: Billet aluminum Fuel Rail Finish: Black anodized Inlet Size: 3/4 in. -16 O-ring Fittings Included: Yes Holley Sniper EFI fuel rails hit the mark every time--on time! It's not enough to shoot fuel to your injectors; the process...

Fuel Rail Material: Billet aluminum Fuel Rail Finish: Black anodized Inlet Size: 3/4 in. -16 O-ring Fittings Included: Yes Hardware Included: Yes Notes: Kit is designed to work with factory LS7 intake, EV1/Bosch style injectors, and Holley EFI...

Fuel Rail Material: Aluminum Fuel Rail Finish: Black anodized Inlet Size: -8 AN O-ring Fittings Included: No Hardware Included: Yes These machined aluminum EFI fuel rails are capable of handling 1,100+ HP engines. They feature a 1/2 in. diameter...

Fuel Rail Material: Billet aluminum Fuel Rail Finish: Black anodized Inlet Size: 3/4 in. -16 O-ring Fittings Included: Yes Hardware Included: Yes Notes: Kit is designed to work with factory LS7 intake and injectors. Includes four male -6 AN to...

Want to convert your carbureted vehicle to Sniper EFI, but don't like the idea of mounting an external fuel pump? Look no further! Sniper EFI Master Kits combine their self-learning throttle body, with an easy-to-install in-tank retrofit returnless...

Holley Sniper EFI Quadrajet self-tuning fuel injection systems are ideal replacements when you're tired of rebuilding the 50-plus-year-old Rochester Quadrajet (Q-jet) on your classic ride. They're the first bolt-on, spread-bore, EFI throttle-body systems...

FiTech Retro LS EFI 600 hp fuel injection systems offer a "golden" opportunity for impressive looks and performance. These classic gold engine-toppers with transmission control are complete throttle body kits, suitable for everything from your junkyard 5...

Holley is now offering budget friendly fabricated intake manifolds for your LSx swap. This is for the LS3/L92. Features: 3mm (1/8") thick T6061 Sheet Aluminum construction, more durable than competitive intakes Available in 92mm and 102mm bore Throttle...

Holley Sniper Fabricated Manifolds continues to push the aftermarket by introducing Low Profile intakes for GM LS Engines. These Intakes are a good looking, perform well, and offer an extremely good value for a performance sheet metal style intake...

Now you can upgrade your LS3/L92 Engine Intakes on a budget Features: 3mm (1/8") thick T6061 Sheet Aluminum construction, more durable than competitive intakes Available in 92mm and 102mm bore Throttle Body Openings 100% TIG welded Available for EFI and...

Holley EFI Fuel Injectors feature a precision lapped disc valve, high-quality brass windings, and high-temp O-rings. These injectors provide excellent linearity with no discernible "bounce" at low pulse widths as commonly found in other injectors.  ...

Holley EFI Fuel Injectors feature a precision lapped disc valve, high-quality brass windings, and high-temp O-rings. These injectors provide excellent linearity with no discernible "bounce" at low pulse widths as commonly found in other injectors. Holley...

FEATURES Simple Installation - Plug and Play control of GM LS1/LS6 engines. Just plug the harness into your factory sensors, wire the power and grounds and you are ready to take complete control of your LS engine More Functionality - Provides...

Looking for a plug and play kit for your GM LS engine? The HP ECU allows you to accurately control the fuel and ignition of your engine plus much more! Got a stock LS engine? Simply download a base map and you're on your way. Got a turbocharged, nitrous...