Holley Terminator X Systems

Take control of your conventional Ford engine with Terminator X! Don't settle for a factory ECU with a cumbersome tuning interface or pre-programmed tuning chip when you can have complete control of your engine, self-learning fuel strategies and the...

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 is capable of fuel map self-learning and...

Take control of your LS engine with Terminator X Max. Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley...

Simplify your Electric Fan installation. No PCM required!!This is our new Fan Control harness and module for an easy, great-looking installation of single or dual electric fans. The fans are triggered by a thermal switch. We have standard NPT as well as...

Plug and play for Holley Avenger, Terminator, HP, and Dominator ECU fuel and oil pressure inputs. Features: Plug and play for both fuel and oil pressure inputs with Holley EFI systems (Terminator systems monitor fuel pressure only) Stainless steel...

The touch screen LCD provides a dynamic range of tuning and data monitoring options in a compact 3.5" LCD display Features: Full Color, Backlit 3.5” Touch Screen LCD Laptop-Free Tuning changes to help optimize mileage, driveability and performance...

Simplify your Electric Fan installation.This is our new Fan Control harness and module for an easy, great-looking installation of single or dual electric fans. This is a ground triggered harness, so it works out-of-the-box with Holley Sniper, Terminator...

Take control of your LS engine with Terminator X! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley EFI at...

Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley...

Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley...

Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley...

The part that Holley forgot! The Sniper Stealth EFI is a great system. It does a great job of converting a car to fuel injection while keeping that classic carburetor look. Unfortunately, Holley ships these systems with some really oddball fittings...

The 558-456 wiring kit is intended to fully populate all of the inputs and outputs for PNs 553-111 and 553-112 Pro Dashes. These can easily be inserted into the existing 34 pin dash connector. It contains loose wires and 2 and 3 conductor cable (jacketed...

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 Terminator...

Have you been searching for a reason to discard your old noisy mechanical speedometer cable? If so, the Holley GPS Module for our 7" Digital displays should be the next addition to your project vehicle. Featuring a simple plug and play installation, this...