Holley EFI Kit Terminator X Ford 302W/ 351W/ 460
Highlights
- Real-Time Fuel Learning
- Onboard Diagnostics Tool
- 3.5" LCD Screen
- Made in the USA
Holley Terminator X EFI Kit for Ford 302W, 351W and 460 Engines.


Unlock powerful settings with Holley's Terminator X EFI Kit (550-937) to get the most horsepower out of your ride. Especially when compared to the restrictive, non-adjustable factory ECU, this upgrade features a variety of adjustable functions that are better suited to your Ford 302W, 351W or 460 engine.
Features and Benefits:
- Plug-and-Play Design for Ford 302W, 351W and460 Engines
- LSU 4.9 Wideband Oxygen Sensor by Bosch
- Built-In 1 Bar MAP Sensor
- Four inputs: 12v, Ground, 5v and Frequency
- Boost Control and Nitrous Control
- Advanced tables
- 3.5in LCD Display Screen with On-Board Diagnostics
- Proudly Manufactured in the USA!
In addition to real-time fuel learning, the Terminator X features a 1 bar MAP sensor and four programmable inputs and outputs. These inputs and outputs are ideal for running electric fans, boost control, nitrous control and so much more!
Kit Includes:
- Terminator EFI ECU
- Terminator Hand-Held Controller
- Main Power Harness
- Injector Harness
- Input/Output Harness
- Can Power Harness
- Can Extension Harness
- Wideband Oxygen Sensor
- Oxygen Sensor Weld-in Bung
- Installation Instructions
Easily access these features and settings with the included 3.5-inch handheld LCD touchscreen. Using the Calibration Wizard, you can set up a base tune for your Ford 302W, 351W or 460 engine in no time. The LCD screen is a highly useful resource that also serves as an onboard diagnostic tool for engine status, wideband, TPS calibration, crank signal and cam signal.
Vehicle Fitment:
- 302w/351w/460 Ford Engines
The Terminator X is proudly made in the USA for quality assurance. Installation is plug-and-play for your Ford 302W, 351W or 460 engine. In addition, you can achieve plug-and-play ignition capability when using Dual Sync and Hyperspark Distributors.
California Residents: Proposition 65 Warning
Related Categories: Mustang Parts, Mustang Engine, Mustang Throttle Body & Accessories, Mustang Throttle Bodies, Mustang EFI Conversion Kits
Only for use on pre-pollution controlled vehicles: This product can be used on vehicles that were manufactured before emissions control regulations were imposed. Pre-pollution vehicles are defined as:
- 1965 and older U.S. manufactured California certified vehicles
- 1967 and older U.S. manufactured federally certified vehicles
Installation Difficulty

Advanced skill is required for this installation.












