Holley EFI Kit Terminator X For LS1/ LS6 Engine 24X Crank 1X Cam/ EV1 Injector



  • Made in the USA
  • On-Board 1Bar MAP Sensor
  • 4 Inputs/Outputs
  • Boost and Nitrous Control
MSRP $2,094.00
You save 10%

Holley Terminator X EFI Kit for LS1 and LS6 Engines with 24X Crank, 1X Cam and EV1 Injectors.

The boost and nitrous control you gain from the Holley Terminator X EFI Kit 550-929 allow you to diversify the performance of your LS1 or LS6 Engine with 24X Crank, 1X Cam, and EV1 Injectors. The onboard LED diagnostic screen will monitor the engine control unit, wideband status, TPS calibration, and the crank or cam signal. Identify potentially critical issues quickly to fully upgrade your truck's performance via four inputs and outputs. This kit comes loaded with base maps for common LS engine combinations that are displayed on a convenient touchscreen LCD handheld calibration wizard! The latest technology from Holley is here with a custom tuning interface and self-learning strategies that will improve your drive every time.

Features and Benefits:
- (4) Inputs/Outputs
- Real-Time Fuel Map Learning for Base Fuel Tables
- High Impedance Injector Drivers Safely Power Most Stock LS/Holley injectors 
- Bosch LSU 4.9 Wideband Relays AFR Information to ECU for Accurate Reading and Precise Tuning Control
- On-Board 1Bar MAP Sensor for Nitrous Engine Combos
- MAP Sensor Vacuum Hose Adapters
- Boost Control over Time, Gear, RPM, Speed, and Boost Safeties
- Nitrous Control over Single Channel of Wet/Dry, Progressive/Non-Progressive, Rich/Lean Safeties, and target Closed Loop AFR
- On-Board Diagnostic LEDS for ECU Power, Engine Run, Wideband Status, TPS Calibration, Crank and Cam Signal
- At-a-Glace Diagnostic Board Identifies Critical Engine Issues
- 3-1/2" Touchscreen Handheld Calibration Wizard for Base Tuning
- Internal Data-Logging and Fully Customizable Gauge Display
- Free EFI Tuning Software for Complete Terminator X Power Plant Control

The LS engine Terminator X Max is a tuning interface control conversion that includes self-learning fuel strategies and the proven, race-winning technology of Holley EFI. Terminator X Max features real-time fuel maps, high-impedance injector drivers, an integrated 1bar MAP sensor, and four programmable inputs and outputs. The inputs and outputs are ideal for electric fans, boost control solenoids, progressive nitrous control, and much more. 

Create advanced tables, like 4x 1D, 1x 1D per Gear Table or 4x 2D, 1x 2D per Gear Table for custom results under flex fuel sensor offset or an oil pressure safety. Program your calibrations with the flexibility of four 12v, Ground, 5v, and Frequency inputs for things such as pressure sensors, or activation triggers for nitrous activation, or trans braking. Additionally, the four Ground or PWM outputs control accessories like fans, boost control, nitrous control, IAC Kit, and more!

- 24x LS Engine Main Harness
- EV1 Injector Harness
- DBW Throttle Body Harness
- Terminator X MAX ECU
- ECU Main Power Harness
- Bosch LSU 4.9 Wideband Oxygen Sensor
- Input/Output Harness
- Assorted Vacuum Adapters (1/8th –1/4th and 3/16ths)

- GM LS1/LS6 Engines with 24x Crank Reluctor, a Drive-By-Wire Throttle Body, and EV1 Injectors

Additional Notes:
- The injector support chart provided in the instructions will NOT control Low Impedance Injectors.
- If your combination requires a 2+Bar, P/N: 12592525 and our adapter P/N: 558-416 are highly recommended.
- Diagnostic LEDs must face up when installing.
- Plug-and-Play compatible with more Holley EFI accessories such as analog-style gauges, shift lights, various modules, and 12.3" digital dash support.

Tech Tip: If you are looking for a pedal, P/N: 10379038 is highly recommended.

California Residents: Proposition 65 Warning

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

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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