Sale and Clearance

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 for your installation.Features: OEM Quality Connectors and Pins J4 connector Perfect for DIY or custom builds for w...

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 for your installation.Features: OEM Quality Connectors and Pins J3 connector Perfect for DIY or custom builds for w...

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 for your installation.Features: OEM Quality Connectors and Pins J2B connector Perfect for DIY or custom builds for ...

j2A, j2B, j3, j4 Connector & Pin Kit - Contains connectors & pins, but no wiring. for Dominator EFISpecs: Brand: Holley EFI Category: Air and Fuel Delivery Emission Code: 5 Harness Type: Auxiliary Part Type: Fuel Injector Connector P...

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 o...

Designed to plug and play with HyperSpark distributors and Holley EFI main harnesses with an ignition connector, such as part number 558-104.Features:Used to run a "timed sequential" fuel strategy, with Holley EFI V5 Build 160 or Later, or Termina...

Looking for a plug and play alternative for your stock or built late model factory EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory...

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, n...

Looking for a plug and play alternative for your stock or built late model factory EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory...

Available with single or dual injector provisions and a burst panel flange, the LS3 Ultra Lo-Ram intake manifold is designed for boosted combinations with hood clearance in mind.The Holley LS3 Ultra Lo-Ram intake manifold kits are designed for GM ...

Terminator X High Impedance 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...

Single Plane EFI LS Intake Manifold. Fits all GM LS Gen III engines equipped with LS7 cylinder heads.Designed with a 4150 Square bore flange. Optimized runner layout and constant cross sectional area - broad torque curve, best vehicle performance ...

Single Plane EFI LS Intake Manifold. Fits all GM LS Gen III engines equipped with LS3/L92 style rectangular port cylinder headsFeatures: 2500-7000 RPM power band 4150 Square bore flange Optimized runner layout and constant cross sectional area - b...

Single Plane EFI LS Intake Manifold. All GM LS Gen III or IV engines equipped with LS1/LS2/LS6 style cathedral port cylinder heads.Features: 2500-7000 RPM power band 4150 Square bore flange Optimized runner layout and constant cross sectional area...

O2 weld ring for any application that uses an oxygen (O2) sensor.Features: Bung Weld-In Style Universal application O2 sensor not included Follow installation instructions for accurate use Specs: Brand: Holley EFI Category: Emission Control Col...

The Holley GM LS1/LS2/LS6 Modular Hi-Ram Intake Manifold is introduced as a cost effective alternative to fabricated sheet-metal for high-performance applications where induction system height is not limited. Coupling this Hi-Ram intake with the h...

The Holley GM LS1/LS2/LS6 Modular Hi-Ram Intake Manifold is introduced as a cost effective alternative to fabricated sheet-metal for high-performance applications where induction system height is not limited. Coupling this Hi-Ram intake with the h...

Fits Holley Hi-Ram Manifolds.They are available in the dual 4150 throttle body pattern or in a full blank top so that you can design your our system. The plenum tops are constructed of cast aluminum.Features: Modular Design w/ Removable Top A-B He...

The Holley GM LS3/L92 Modular Hi-Ram Intake Manifold is introduced as a cost effective alternative to fabricated sheet-metal for high-performance applications where induction system height is not limited. Coupling this Hi-Ram intake with the high...

Add even more power to your Gen III Hemi engine with a Holley Hi-Ram intake manifold. This cast intake manifold has large intake ports - fits 2009-up 5.7L, 2005-2010 6.1L & 2011-up 6.4L engines.The Holley Hi-Ram intake manifold is for high-pe...

T-56 Magnum Transmission Harness - Terminated for VSS, Reverse Lockout, and Reverse Lights.Specs: Brand: Holley EFI Category: Transmission Connector Quantity: 4 Emission Code: 3 Harness Application: GM Harness Type: Transmission Part Type: ...

Service harness sensor adapter for Terminator X and X Max ECU only.Features: Replacement/Service harness Designed for Terminator X and Terminator X Max (2) Connectors Black color Specs: Brand: Holley EFI Category: Air and Fuel Delivery Emission...

The Terminator X Stealth 4150 EFI system from Holley features 4, 100LB/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction applications. The Terminator X ECU features fuel maps that self-learn and...

If you are piecing together your EFI system or suffered damage to your current throttle body, we have made it easier to get the parts you need. You no longer need to buy an entire EFI kit to get the service part you need to get back on the street ...