Holley MPFI Kit Terminator X Max W/GM Drive-By-Wire Throttle Body Control Universal For EV1 Injectors



  • Plug-and-Play ECU
  • Self-Learning Fuel Strategies
  • 4 Programmable Inputs
  • Made in the USA
MSRP $2,277.00
You save 10%

Holley Terminator X Max Universal Multi-Port Fuel Injection Kit with a GM Drive-By-Wire Throttle Body Control for EV1 Injectors.

Convert your classic car or truck to multi-port fuel injection with the Holley Terminator X Max Universal MPFI Kit (550-950)! This bolt-on ECU is equipped with self-learning fuel strategies, a Bosch LSU 4.9 wideband O2 sensor, and an integrated 1bar MAP sensor, ensuring your engine is always ready to give its best performance. There are also 4 programmable inputs and outputs that are perfect for racing upgrades like electric fans, boost control solenoids, progressive nitrous control, and more. The included high-impedance injector drivers power most stock injectors as well as most Holley EFI injectors.

Features and Benefits:
- Plug and play Domestic V8 engine control, such as conventional push rod Ford and Chevrolet engines.
- Includes EV1 Injector Harness
- GM DBW Throttle Body Control Harness
- High Impedance Injector Drivers safely power most Stock injectors and Holley EFI Injectors
- Bosch LSU 4.9 wideband O2 sensor relay AFR to the ECU for accurate readings and precise tuning
- Built-in 1bar MAP Sensor
- Includes MAP Sensor vacuum hose adapters (1/8th – 1/4 and 3/16ths)
- Plug and plug ignition capability with Dual Sync and HyperSpark Distributors (adapter 558-323 required for HyperSpark Distributors)
- 4 programmable Inputs: 12v, ground, 5v, and frequency 
- Inputs are perfect for add-ons like nitrous activation triggers and extra pressure sensors
- 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
- On-Board Diagnostic LEDs allow you to identify critical engine issues at a glance
- 3.5" Touchscreen handheld device with calibration wizard for easy tuning 
- Handheld also provides internal data logging and a fully customizable gauge display
- Compact ECU size
- Compatible with Holley accessories like analog-style gauges and shift lights
- Free EFI Tuning Software for complete control of your Terminator X power plant

The Terminator X Max is packed with base maps built for common V8 engine combinations. When used in conjunction with the included calibration wizard, you’ll enjoy a truly custom tune that makes the most of your engine’s potential power. This calibration wizard is accessible through the included 3-1/2” LCD touchscreen device which also provides internal data logging and a customizable gauge display. For users who prefer a more personal touch, this kit includes Holley’s software suite which allows full laptop access to accommodate advanced users and experienced tuners. Once the tuning is complete and you’re ready to hit the road, a full range of onboard diagnostic LEDs help you keep tabs on ECU Power, Engine Run, Wideband Status, TPS Calibration, Crank Signal, and Cam Signal. This kit is made in the USA and is complete with a GM-style drive-by-wire throttle body control and a harness for EV1 fuel injectors.

Tech Tip: For Boosted applications, you can disable the internal MAP sensor and use an external MAP Sensor. The harness is equipped with a terminated connector for this purpose.

California Residents: Proposition 65 Warning

Related Categories: Mustang Parts, Mustang Electrical & Wiring, Mustang EFI Engine & Injector Harnesses, Mustang Engine, Ford Bronco Parts

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


Intermediate skill is required for this installation.

Vehicle Fitment

This product will fit the following Bronco years:

This product will fit the following C/K years:

  • 1988,
  • 1989,
  • 1990,
  • 1991,
  • 1992,
  • 1993,
  • 1994,
  • 1995,
  • 1996,
  • 1997,
  • 1998,

This product will fit the following C10 years:

This product will fit the following F-100 years:

  • 1948,
  • 1949,
  • 1950,
  • 1951,
  • 1952,
  • 1953,
  • 1954,
  • 1955,
  • 1956,
  • 1957,
  • 1958,
  • 1959,
  • 1960,
  • 1961,
  • 1962,
  • 1963,
  • 1964,
  • 1965,
  • 1966,
  • 1967,
  • 1968,
  • 1969,
  • 1970,
  • 1971,
  • 1972,
  • 1973,
  • 1974,
  • 1975,
  • 1976,
  • 1977,
  • 1978,
  • 1979,

This product will fit the following Mustang years:

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