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Terminator X Max Kit - Gen 2 Coyote by Holley

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Terminator X Max  Kit - Gen 2 Coyote
Terminator X Max  Kit - Gen 2 Coyote
Terminator X Max  Kit - Gen 2 Coyote
Terminator X Max  Kit - Gen 2 Coyote
How to Install a Holley Terminator X Max ECU on a Ford Coyote Engine

Easily wire up and control your Gen 2 Coyote engine with a 4R70W or a manual transmission using this Holley Terminator X Max kit!

Item #HLY-5501512
MPN# 550-1512

Everyday Low Price: $2,811.95

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  • Real-Time Self-Learning Fuel Strategies
  • Built-In Boost & Nitrous Control
  • Plug & Play Harnesses
  • On-Board Diagnostics


  • Pre-Loaded With Base Maps For Gen 2 Coyote
  • High Impedance Injector Drivers
  • Customizable Gauge Display
  • Built-In 1 Bar MAP Sensor

 What's in the Box

  • (1) Terminator X ECU
  • (1) 3.5" Touchscreen LCD Handheld
  • (1) ECU Mounting Bracket
  • (1) Ti-VCT Controller and Harness
  • (1) Primary Engine Harness
  • (1) Power Harness
  • (1) Injector Harness
  • (1) Drive-By-Wire Harness
  • (1) 1998+ 4R70w Transmission Harness
  • (2) Ignition Modules
  • (1) EV6 Injector Harness
  • (1) Bosch LSU 4.9 Wideband Oxygen Sensor
  • (1) Built-In 1 Bar Manifold Absolute Pressure Sensor
  • (1) Vacuum Hose Adapter Kit

Terminator X Max  Kit - Gen 2 Coyote - 4R70w - 550-1512

Take control of your Gen 2 5.0 Coyote engine with Ti-VCT and transform the power, efficiency, and drivability with Holley's Terminator X Max Kit! Don't settle for a factory control pack with the limited tuning ability and no self-learning capability when you can have complete control of your engine, self-learning fuel strategies, and the proven, race-winning technology of Holley's EFI at a budget-friendly price! The Terminator X Max features real-time fuel learning, high impedance injector drivers, an integrated 1 bar MAP sensor, and 4 programmable inputs and outputs. Holley manages to fully integrate Ford's factory Twin Independent Variable Camshaft timing (Ti-VCT) with the Coyote Ti-VCT control modules included with this Holley Terminator Max system. The X max also comes with an integrated electronic transmission controller that works on the 1998+ 4R70W transmission. As well as will work with any manual transmission option! The added inputs and outputs are ideal for electric fans, boost control solenoids, progressive nitrous control, and much more. The Terminator X comes fully loaded with base maps for your Gen 2 Coyote engine 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 gauges, and display functions. Holley EFI's industry-leading, easy-to-use software is provided to allow full laptop access for advanced tuning. Whether you are building a budget beater or a boosted race car, Holley EFI's Terminator X for the 2015-2017 Gen 2 Coyote engine has the features and technology you need at a price that won't break the bank!

Product Highlights

  • The harness included in this kit was meticulously measured to be routed through the firewall, imitating the factory wiring harness.
  • This is a NO LAPTOP REQUIRED kit! Simply enter the information about your specific engine combination into the wizard on the 3.5" handheld touchscreen and the ECU will build a tune map around your specifications the more the car is driven! No need to be an EFI or tuning expert!
  • Integrated electronic transmission controller that works on the 4R70W transmission.

Full List of Features:

  • Plug and play engine control (for Ford 5.0L Coyote with Ti-VCT (Twin Independent Variable Camshaft timing)
  • Plug and play compatible with Holley EFI accessories – Analog gauges, shift lights, modules, and both 6.86” and 12.3” Pro Dash
  • EV6 injector harness included
  • High Impedance Injector drivers power Holley EFI and most stock injectors -Injector support chart found in instructions (will not support low impedance injectors)
  • Included Bosch LSU 4.9 wideband O2 sensors for accurate readings and precise tuning control
  • Built-in 1998+ 4R70W Transmission Controller
  • 1998+ Ford AODE/4R70W Transmission Control Harness (Terminator X Max Only)
  • Works on Manual Transmission
  • Built-in 1bar MAP (manifold absolute pressure) sensor included - For Boosted applications – internal MAP sensor can be disabled and utilize external MAP sensor harness (kit includes a terminated connector for seamless installation)
  • Vacuum hose adapters included - (1/8”, ¼”, and 3/16” sizes)
  • 4 inputs – 12v, Ground, 5v, and frequency for items like pressure sensors, activation triggers, nitrous activation, or trans brake
  • Boost Control – boost vs. time, boost vs. gear, boost vs. RPM, boost vs. speed, and boost safeties
  • Nitrous Control – channels for wet or dry, progressive or non-progressive, rich/lean safeties, and target closed loop AFR (Air/Fuel Ratio)
  • Advanced Tables – ( 4x 1D tables, 1x 1D gear table, 4x 2D table, and 1x 2D gear tables) for nearly unlimited table configuration options
  • On-board diagnostic LEDS - ECU power, engine run, TPS calibration, cam signal, and more! Identify critical engine parameters at a glance
  • 3.5” touchscreen handheld included - Internal data-logging, custom gauge display, and calibration wizard allow quick building bases tunes for any Domestic V8 engine
  • Compact ECU (Engine Control Unit) – At only 7.45” x 4.1” x 1.66” the compact packaging allows mounting virtually anywhere (XMAX ECU = 9.6” x 4.1” x 1.66”). REMINDER: diagnostic LEDs must face up!
  • FREE EFI Tuning software – For complete control of your Terminator X power plant
  • Plug and play compatible with more Holley EFI accessories such as; analog-style gauges, shift lights, various modules, 12.3" digital dash support!

Tuning & Software Note

  • Holley provides the Terminator X Tuning Software for free to completely control your power plant!
  • The Tuning Software Lists Injector Data For Varying Applications.

Holley Warranty - Click Here

Fitment Notice
  • Fits 2015-2017 Mustangs built after 2/24/2016 due to the change of ignition coils.
  • Due to the custom nature of this product, please be sure to read all installation manuals provided.
  • Compatible with any manual transmission but would require making or sourcing transmission-specific harness to wire into the Terminator. 

How to Install a Holley Terminator X Max ECU on a Ford Coyote Engine

Check out our YouTube channel for even more tech tips, installation videos, how-tos, and more. The best place to go for anything Mustang related!

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    About This Brand

    Holley, The Heart & Soul of Performance.

    For over 100 years Holley has been proven to be an industry leader by providing Mustang enthusiasts and racers with the high performance carburetors , intake manifolds, cylinder heads, and other quality performance components needed for today's competition. Holley's performance Mustang parts are perfect for any daily driven or high horsepower race car.

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