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Holley Efi Terminator X Without Touchscreen - Gm Ls1/Ls6 - Ev6 Injectors

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Seize command of your LS engine with Terminator X! Reject the notion of settling for a salvage yard ECU burdened with a cumbersome tuning interface when you can attain total control over your engine. With self-learning fuel strategies and the race-proven technology of Holley EFI—all at an economical price—Terminator X is your gateway to supreme engine management!

Terminator X boasts real-time fuel learning, high-impedance injector drivers, an integrated 1bar MAP sensor, and 4 programmable inputs and outputs. Tailored for electric fans, boost control solenoids, progressive nitrous control, and more, these inputs and outputs provide unparalleled flexibility. Loaded with base maps for common LS engine configurations, Terminator X ensures a swift transition from the garage to the road or track. The Terminator X kits now feature a USB/CAN tuning cable in lieu of the 3.5" Handheld LCD, necessitating the use of the free Terminator X Software for initial setup.


  • Designed for GM LS1/LS6 engines with a 24x crank reluctor and EV6 Injectors.
  • Real-time fuel map learning eliminates the guesswork in tuning your base fuel table.
  • High-impedance Injector Drivers power most Stock LS injectors and Holley EFI Injectors safely (Injector support chart provided; does not control Low Impedance Injectors).
  • All new Terminator X systems utilize the Bosch LSU 4.9 wideband to relay AFR information for accurate readings and precise tuning control.
  • On-Board 1bar MAP sensor, ideal for N/A or Nitrous engine combos. For combinations requiring a 2+Bar, GM 12592525 is recommended, along with adapter part number 558-416.
  • MAP Sensor vacuum hose adapters (1/8th – ¼ and 3/16ths).
  • 4 Inputs – 12v, Ground, 5v, and Frequency for additional pressure sensors or activation triggers for nitrous activation or a trans brake.
  • 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, customizable for any dreamt-up tables, such as Flex Fuel Sensor Offset Table or a custom fuel or oil pressure safety!
  • 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.
  • Includes CAN/USB tuning cable for real-time configuration of your ECU and engine tuning.
  • The compact ECU size enables versatile mounting. Remember, diagnostic LEDs must face up!
  • Plug and play compatible with additional Holley EFI accessories such as analog-style gauges, shift lights, various modules, and soon, 12.3" digital dash support!
  • Free EFI Tuning Software for complete control of your Terminator X power plant.
  • Includes: 24x LS Engine Main Harness - EV6 Injector Harness - Terminator X ECU - ECU Main Power Harness - Bosch LSU 4.9 Wideband Oxygen Sensor - Input/Output Harness - and assorted vacuum adapters.
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