Holley Terminator X MPFI Kit With GM 4L60E/ 4L80E/ DBW Throttle Body Control/ EV1 Fuel Injectors Universal



  • Plug-And-Play Installation
  • Precise Tuning Control
  • Easily Identify Engine Issues
  • Made In The USA
MSRP $2,562.00
You save 10%

Holley Terminator X Universal MPFI Kit with GM 4L60E/4L80E Transmission Control, GM Drive-by-Wire Throttle Body Control, and EV1 Fuel Injectors.

The Holley Terminator X Universal MPFI Kit (550-959) is the ideal choice for upgrading your engine performance and customizing it how you want. The kit's high-impedance injector drivers are capable of safely powering even stock or electronic fuel injectors, while Bosch LSU 4.9 wideband sensors relay accurate AFR readings and provide precise tuning control. Furthermore, four outputs cater to a range of functions including Ground, PWM, fans, and boost/nitrous control (with both progressive and non-progressive nitrous options).

Features and Benefits:
- Great domestic V8 engine control (conventional push rod Ford/Chevy engines)
- High-impedance injector drivers safely power most stock/EFI injectors
- Utilizes Bosch LSU 4.9 wideband to relay AFR information
- Accurate readings and precise tuning control
- Four outputs for Ground, PWM, fans, boost/nitrous control, IAC kit, and more
- Four inputs for 12V, 5V, ground, frequency, pressure sensors, and activation triggers
- Boost control solenoids for time, gear, RPM, speed, and safeties
- Progressive nitrous control allows single-channel wet or dry
- Non-progressive nitrous control for rich/lean safeties and target closed loop AFR
- Onboard diagnostics LEDs monitor ECU power, engine run, and TPS calibration
- Easily identify critical engine parameters and monitor cam signal
- Built-in 1bar MAP sensor with included external harness for boosted applications
- Plug-And-Play compatible with Holley analog-style gauges, shift lights, and modules
- Compatible 12.3” digital dash support and Dual Sync and HyperSpark Distributors
- Free EFI Tuning Software for complete control of your Terminator X power plant
- Made in the USA
* If using a HyperSpark Distributor, P/N: 558-323 adapter is required

The kit also features four inputs compatible with 12V accessories, 5V pressure sensors, ground connections, and frequency-based components. On top of this, there is included IAC kit plus boost safeties for time, gear position, RPM, and speed settings along with rich/lean nitrous safeties and target closed-loop AFR controllers. Built-in diagnostics LEDs monitor ECU power ensuring your engine remains reliably always optimized. This MFPI kit uses plug-and-play harnesses for simpler installation and comes with free EFI software that allows you to fine-tune and customize your system in nearly endless ways.

Kit Includes:
- EV1 injector harness
- GM DBW throttle body control harness
- GM 4L60E/4L80E transmission control harness
- Terminated connector for external MAP sensor
- Terminator X ECU
- ECU main power harness 
- Bosch LSU 4.9 wideband oxygen sensor 
- Input/output harness 
- Assorted vacuum adapters (1/8”, 1/4”, and 3/16”)

Tech Tip 1:
- Advanced Tables – 4x 1D Tables, 1x 1D per Gear Table, 4x 2D Tables, 1x 2D per Gear Table, can be used for nearly unlimited table configuration options.

Tech Tip 2:
- The included 3.5" Touchscreen Handheld contains a calibration wizard, that allows you to quickly build a base tune for any domestic V8 engine. Additionally, the handheld provides internal data logging and a fully customizable gauge display.

Tech Tip 3:
- The compact ECU size allows you to mount it virtually anywhere. Remember, diagnostic LEDS must face up!

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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