Skip to main content
Motor Life Events Community Support

Terminator X

Terminator X and X Max Features and Benefits

  • Plug and play Domestic V8 engine control
  • Drive-by Wire Throttle Body Control (Terminator X Max Only)
  • Transmission Control (Terminator X Max Only)
  • Genuine Bosch LSU 4.9 Wideband Control (Will not work with LSU 4.2 Oxygen Sensors)
  • On-Board Diagnostic LEDS for: ECU Power – Engine Run – Wideband Status – TPS Calibration – Crank Signal – Cam Signal. Allow you to identify any Critical engine issues at a glance
  • Built in 1bar MAP Sensor, vacuum hose adapters included (1/8th – ¼ and 3/16ths) - or for Boosted applications, you can disable the internal MAP sensor, and utilize an external MAP Sensor, the harness comes with the connector terminated, making the installation a snap.
  • 4 Inputs – 12v, Ground, 5v, and Frequency, for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake (Fuel and Oil Pressure Inputs are pre-terminated)
  • 4 Outputs – Ground, PWM - , for accessories such as; fans, boost control, nitrous control, IAC Kit, and More
  • 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
  • Integrated Datalogging to the 3.5” Handheld SD Card
  • Free EFI Tuning Software for complete control of your Terminator X power plant
techvideoHolley EFI Tech
Introducing Holley EFI V6 Software Updates
Holley Video Team
06/25/2021
10 min read
Video
Holley EFITerminator X TechTerminator X Stealth 4500
Going In-Depth With Holley's Terminator X Stealth 4500 EFI System
Bradley Iger
03/16/2021
10 min read
tech
Terminator X TechTerminator X Stealth 4500GM LS
Terminator X 4500 Stealth Helps This 10,400 RPM Capable Dual-Quad EFI Small Block Make 1,081 Horsepower At EFI University
Jason Reiss
03/08/2021
10 min read
tech
Terminator X TechHolley EFITerminator X
Ditch the Carb and Go EFI with Holley Terminator X Stealth 4500 and 4150
Holley Video Team
01/13/2021
10 min read
Video
Terminator XGen 3 HemiGen III
Holley Terminator X ECU Now Supports Gen 3 Hemi VVT and SRV Control
Staff Writer Staff Writer
09/18/2020
10 min read
Video
Terminator X TechTerminator X MaxTerminator X
How to Install a Holley Terminator X Max ECU on a Ford Coyote Engine
Staff Writer Staff Writer
07/27/2020
10 min read
tech
Terminator X TechTerminator X MaxTerminator X
How To Email Datalogs and Global Files for Holley EFI and Terminator X
Staff Writer Staff Writer
04/24/2020
10 min read
tech
Terminator X TechTerminator X MaxTerminator X
How To Setup Inputs & Outputs on Terminator X EFI
Staff Writer Staff Writer
04/09/2020
10 min read
tech
productsTerminator X TechTerminator X Max
Terminator X for Ford Part 2: Installing MSD Pro 600 & Cam Sync on Small Block Ford
Staff Writer Staff Writer
04/02/2020
10 min read
Video

Diagnostic LED's

  • 8 Built-in multi-color diagnostic LED's allow you to quickly identify a variety of potential system issues, such as a failed TPS Autoset - faulty crank or cam sensors, or potential oxygen sensor issues!
  • 1. ECU Power - Green = ON
  • 2. Engine Running - Green = Running - Yellow = No RPM
  • 3. Wideband Status - Blue = Too Hot, Too Cold, Slow Warmup, or Uncalibrated, Green = OK!, Red = Sensor Failure, Yellow = Sensor Heating, Off = Sensor Disabled.
  • 4. TPS Calibration - Green - Calibrated, Red = Calibration Error, Cyan = DBW Pedal Calibration Error, Purple = DBW TB Calibration Error.
  • 5. Undefined - Future Use!
  • 6. Crank Signal - Green = Tooth Detected, below crank to run RPM (400RPM), Blue = Gap Detected, below crank to run RPM (400RPM), Red = Crank Error Detected, Off - Synced Properly.
  • 7. Cam Signal - Green = Tooth Detected, below crank to run RPM (400RPM), Blue = Gap Detected, below crank to run RPM (400RPM), Red = Cam Error Detected, Off - Synced Properly.
  • 8. Undefined - Future Use!

Troubleshooting at a Glance!

How To Identify GM LS 24 or 58 Tooth Crank Sensors

  1. Proper sensor identification is critical when selecting any LS EFI system - 24x sensors operate at 12v, where as 58x sensors operate at 5v.
  2. *Crankshaft sensors may not follow this color scheme, it's always best to confirm what crankshaft reluctor wheel is in your engine*

Injector Identification Chart

  • GM used three different injector connector styles on the LS engines. Left - Bosch (EV1) - Center - USCAR (EV6) and Right - Multec 2, which were used in early LS truck engines.

Need Help Identifying your Injectors?

Terminator X ECU Connections

  • J1A - Main Harness Connector - This connector is primarily an “Input” connector. It contains all the sensor inputs and wide band oxygen sensor control.
  • J1B - Main Harness Connector - The second connector is the “J1B” connector (26 pin). This connector is the “output” connector. It has 8 injector outputs and outputs for other devices.
  • MAP Sensor - used on N/A applications, connect directly to full manifold vacuum port on the intake manifold.
  • Main Power - Connects to the Main Power Harness, these two wires MUST be wired directly to the Battery Terminals.

Terminator X Max ECU Connections

  • J1A - Main Harness Connector - This connector is primarily an “Input” connector. It contains all the sensor inputs and wide band oxygen sensor control.
  • J1B - Main Harness Connector - The second connector is the “J1B” connector (26 pin). This connector is the “output” connector. It has 8 injector outputs and outputs for other devices.
  • MAP Sensor - used on N/A applications, connect directly to full manifold vacuum port on the intake manifold.
  • Main Power - Connects to the Main Power Harness, these two wires MUST be wired directly to the Battery Terminals.
  • J3 - Connection point for the Drive-By-Wire harness.
  • J4 - Connection point for the Transmission harness.

Handheld Boost Control!

  • The Terminator X system integrates boost control functionality into the handheld, allowing you to easily change timing and AFR offset without needing a Laptop!
  • For the advanced user, the Terminator X Software contains a robust boost control system, with Dome Control, Boost By Time/Gear/RPM/Speed, and built in Boost Safeties.

Boost Control at your Fingers Tips

Bottle Fed Power Management!

  • If nitrous oxide is your power adder of choice, the Terminator X system put nitrous control in your hands!
  • Through the handheld you have the power to set Min/Max RPM for Nitrous Activation, retard or advance timing, set Target AFR, and even build custom progressive curves for both Nitrous Percentage, and Ignition Timing.

Nitrous Control made easy!

Compare The Facts

Hardware HP TERMINATOR X DOMINATOR TERMINATOR X MAX SNIPER TBI
Connectors 2 2 6 4 -
Injector Drivers 8 8 12 8 8
Low Impedance Injector Drivers YES NO YES NO NO
Communication via USB Port YES NO YES NO NO
Communication via CAN adapter NO YES NO YES YES
Diagnostic LEDs NO YES NO YES NO
Knock Sensors 2 2 2 2 -
Enclosure Aluminum Composite Aluminum Composite -
Potted YES NO YES NO YES
Data Logging HP TERMINATOR X DOMINATOR TERMINATOR X MAX SNIPER TBI
Internal & External External Only Internal & External External Only External Only
MAP Sensor HP TERMINATOR X DOMINATOR TERMINATOR X MAX SNIPER TBI
External Only Internal 1 BAR, or External External Only Internal 1 BAR, or External Internal 2.5 BAR
Wideband Sensors HP TERMINATOR X DOMINATOR TERMINATOR X MAX SNIPER TBI
1 1 2 1 1
Bosch 4.2 YES NO YES NO NO
NTK YES NO YES NO NO
Bosch 4.9 NO YES NO YES YES
Total Inputs (+12v, Gnd, 5v, Freq) HP TERMINATOR X DOMINATOR TERMINATOR X MAX SNIPER TBI
4 4 50 4 Varies
+12v Yes Yes Yes Yes No
Ground Yes Yes Yes Yes 2
+5v Sensor Yes Yes Yes Yes 3* - SS Only
Frequency Yes Yes Yes Yes NO
Thermistor Yes NO Yes NO NO
+20v Yes NO Yes NO NO
Digital Speed NO NO Yes NO NO
Customizable Software Inputs 80 20 80 20 NO
A/C Shutdown Yes Yes Yes Yes NO
Total Outputs (Gnd, PWM-) HP TERMINATOR X DOMINATOR TERMINATOR X MAX SNIPER TBI
4 4 36 4 Varies
+12v Yes NO Yes NO No
PWM+ Yes NO Yes NO No
Ground Yes Yes Yes Yes YES
PWM- Yes Yes Yes Yes YES
Customizable Software Outputs 62 20 62 20 NO
Dual Fans Yes Yes Yes Yes YES
Secondary Fuel Pump Yes Yes Yes Yes YES
IAC Kick Yes Yes Yes Yes YES
Non-Electronic Trans TCC Control Yes Yes Yes Yes NO
Load Sensing HP TERMINATOR X DOMINATOR TERMINATOR X MAX SNIPER TBI
VE YES YES YES YES YES
Speed Density YES YES YES YES YES
Alpha-N YES YES YES YES NO
Combo YES YES YES YES NO
Boost Control HP TERMINATOR X DOMINATOR TERMINATOR X MAX SNIPER TBI
MAP and Dome Control YES NO YES NO NO
Dome Control YES YES YES YES YES
Boost vs Time YES YES YES YES YES
Boost vs RPM YES YES YES YES YES
Boost vs Speed YES YES YES YES NO
Boost vs Gear YES YES YES YES NO
Boost Builder YES NO YES NO NO
Boost Safeties YES YES YES YES YES
Nitrous Stages HP TERMINATOR X DOMINATOR TERMINATOR X MAX SNIPER TBI
Wet Non-Progressive 8 1 8 1 1
Wet Progressive 8 1 8 1 1
Dry Non Progressive 8 1 8 1 1
Dry Progressive 8 1 8 1 1
GPOs 8 1 8 1 NO
Rich/Lean Safeties YES YES YES YES YES
Closed Loop to New Target YES YES YES YES YES
Advanced Input Strategies YES NO YES NO NO
Advanced Tables HP TERMINATOR X DOMINATOR TERMINATOR X MAX SNIPER TBI
1D 8 4 8 4 4
1D Per Gear 8 1 8 1 NO
2D 8 4 8 4 2
2D Per Gear 8 1 8 1 NO
Traction Control HP TERMINATOR X DOMINATOR TERMINATOR X MAX SNIPER TBI
YES NO YES NO NO
Water/Meth HP TERMINATOR X DOMINATOR TERMINATOR X MAX SNIPER TBI
YES NO YES NO NO
Staging Assist HP TERMINATOR X DOMINATOR TERMINATOR X MAX SNIPER TBI
YES YES YES YES NO
Drive By Wire HP TERMINATOR X DOMINATOR TERMINATOR X MAX SNIPER TBI
Single Throttle Body NO NO YES YES NO
Dual Throttle Body NO NO YES NO NO
Transmission Control HP TERMINATOR X DOMINATOR TERMINATOR X MAX SNIPER TBI
GM 4L60/4L70/4L80 NO NO YES YES NO
Ford AODE/4R70W NO NO YES YES NO
Accessories HP TERMINATOR X DOMINATOR TERMINATOR X MAX SNIPER TBI
7" Digital Dash YES YES YES YES YES
Pro-Dash YES YES YES YES YES
CAN Modules (VVT, etc) YES YES YES YES NO
Analog Gauges YES YES YES YES YES
  • Holley EFI x
  • Filter
  • Clear
Filter
Availability
Categories
Ignition Type
Injector Connector
Product Type
Show More
?
Crank Reluctor
Terminator LS Options
price
  • to
Applied Filters:Clear All
Items 1 - 224 of 224 Items
    1. 1


    Back To Top

    Terminator X

    Terminator X and Terminator X Max. Two powertrain management systems from Holley that offer plug and play control for most domestic V8 engines starting at just $999. Why settle for a junkyard or factory ECU with a cumbersome aftermarket tuning interface when you can get complete control of your engine, self-learning fuel strategies and the proven, race winning technology of Holley EFI for under a grand!