Holley EFI

100 PSI / -40C TO 105C - SENSOR COMBOFeaturesDesigned for GM LS Engines with 58x Crank, 4x Cam - and EV1 Injectors.Real-Time fuel map learn, takes the guess work out of tuning your base fuel table.High Impedance Injector Drivers will safely power most...

Main Harness for 99-04 2 & 4 Valve Ford Modular (4.6 & 5.4L) Engines for use with Holley Smart CoilsFeaturesBright dip, black anodized finish with laser etched EFI logo for long lasting good looks5/8” diameter fuel passage provides the flow capacity...

Replacement USB Harness for Holley EFI Pro Dashes - 553-111 and 553-112Features4500 Units Contain 4 Injectors, and Support up to 1500 HP Naturally Aspirated or 1250 HP with Forced Induction2.125” Throttle Plates, Flow 1440 CFM for Large Cubic Inch...

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...

Main harness for 99-04 2 & 4 Valve Ford Modular (4.6 & 5.4L) Engines.FeaturesBuilt in C-O-P HarnessAdditional 40 amp relay to power individual coilsPre-Terminated for Ford PWM IAC20awq gauge wire or larger!Plug and play with 558-312 or 558-318 Smart Coil...

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 Holley...

Holley EFI LS wires are designed to work with Hooker shorty headers to prevent burns resulting in misfires.Features3x 20awg wireAvailable in 25?

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 Holley...

HEI Adapter HarnessFeaturesBolt on 4150 Flange Carburetor ReplacementSupports up to 1250HP with eight 100lb/hr InjectorsTerminator X Max Stealth 4150 kits provide transmission control for Pre-2009 GM 4L60E/4L80E Transmissions (Part numbers 550-1014,...

92mm Throttle Body flange (For use when fabricating a sheet metal topFeaturesSingle Channel CAN EGT Module, for a quick and easy installation with Holley EFI, Part Number 554-184CSingle Channel Analog Controller with unterminated output wires, to be used...

Introducing the Holley EFI Single Channel EGT Kits. Exhaust Gas Temperature data is critical information when your engine tune up is on the ragged edge. Knowing the exhaust temperature can help you identify potential horsepower left on the table, or pin...

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...