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Holley EFI Terminator X - Fox Body Mustang 5.0 EFI Kit

1979-1993 Ford Mustang

Part # 550-937F
5 Reviews

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3

Emissions

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.

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Take control of your 302ci Small Block Ford engine in your Fox Body Mustang with Holley EFI Terminator X system! Don't settle for the 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 proven, race-winning technology of Holley EFI at a budget-friendly price! Terminator X features real-time fuel learn, high impedance injector drivers, an integrated 1bar MAP sensor, and 4 programmable inputs and outputs. The inputs and outputs are ideal for electric fans, boost control solenoids, progressive nitrous control, and much more. Terminator X comes fully loaded with base maps for common V8 Ford engine combinations to get you out of the garage and on the road/track fast. The 3.5" touch screen LCD handheld contains an easy to use calibration wizard as well as tuning and gauge display functions. Also included is Holley EFI's industry-leading, easy to use software suite that allows full laptop access for advanced users. Whether you are building a budget beater or a boosted race car, Terminator X has the features and technology you need at a price that won't break the bank!

Features:

  • Plug and Play with 1987-1993 Fox Body Mustangs, powered by the factory 302ci Small Block Ford, with the stock TFI Distributor
  • This Kit contains an ECU Mounting Bracket - TFI Ignition Adapter - a Fox Body specific engine main harness, as well as MAT and CTS sensors
  • Includes EV1 Injector Harness, which will directly replace the old, brittle, factory Ford Injector harness
  • High Impedance Injector Drivers will safely power most Stock injectors, and Holley EFI Injectors
  • All of the new Terminator X systems utilize the Bosch LSU 4.9 wideband to relay AFR information to the ECU for accurate reading and precise tuning control
  • Built in 1bar MAP Sensor, vacuum hose adapters included (1/8th – ¼ and 3/16ths) –
  • For Boosted applications, you can disable the internal MAP sensor, and utilize an external MAP Sensor, the harness comes with the connector pre-terminated.
  • Plug and play ignition capability with Dual Sync and HyperSpark Distributors, adapter 558-323 required for HyperSpark Distributors for those of you wanting to upgrade your ignition system.
  • The included 3.5" Touchscreen Handheld contains a calibration wizard, that allows you to quickly build a base tune for any Ford V8 engine.
  • Additionally the handheld provides internal data-logging and a fully customizable gauge display.
  • 4 Inputs – 12v, Ground, 5v, and Frequency, for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake
  • 4 Outputs – Ground, PWM - , for accessories such as; fans, boost control, nitrous control, IAC Kit, and More
  • On-Board Diagnostic LEDS for: ECU Power – Engine Run – Wideband Status – TPS Calibration – Crank Signal – Cam Signal, allowing you to identify any Critical engine issues at a glance
  • Boost Control – Boost vs Time, Boost vs Gear, Boost vs RPM, Boost vs Speed, Boost Safeties
  • Nitrous Control – Single Channel of Wet or Dry, Progressive or Non-Progressive, Rich/Lean Safeties, and target Closed Loop AFR
  • Advanced Tables – 4x 1D Tables, 1x 1D per Gear Table, 4x 2D Tables, 1x 2D per Gear Table, can be used for any custom tables you can dream up, such as Flex Fuel Sensor Offset Table, or a custom fuel or oil pressure safety!
  • The compact ECU size allows you to mount it virtually anywhere. Remember, diagnostic LEDS must face up!
  • Plug and play compatible with more Holley EFI accessories such as; analog style gauges, shift lights, various modules, 12.3" digital dash support!
  • Free EFI Tuning Software for complete control of your Terminator X power plant

About Holley EFI

Holley is the new standard in EFI! Whether you're engine swapping your classic car or need to manage 4000 horsepower in your twin-turbocharged drag radial race car, Holley EFI has the solutions you need to get your project up and running better than ever!

Brand Holley EFI
Emission Code3
4
EngineSmall Block Ford
Ignition TypeFord TFI
Injector ConnectorJetronic / Minitimer (Bosch)
Product TypeTerminator X Ford MPFI Kit
UPC090127074343
Part Number550-937F
3

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.


The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle


WARNING: It is against the law to install this part on an Emissions Controlled Vehicle


The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle
Holley EFI Dealers
Do you need a custom kit built for your application? Do you need a system installed and tuned? Click here to find the Holley EFI dealer in your area!
Terminator X ECU's are designed to be mounted with the LED's facing up. When paired with a Digital Dash in the stock gauge bezel, you will need CAN adapter P/N 558-425

Detailed Fox Body Mustang Wiring Guide

Terminator X Fox Body Mustang Sensors and Wiring Overview

The Ultimate Boosted Fox Body Terminator X Installation with a MSD Pro 600 Ignition!

Holley EFI Fox Body Mustangs in Action!

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Some parts are not legal for use in California or other states with similar regulations.