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550-918T - Terminator X Max LS2/LS3 and Late 58x/4x LS Truck Kit with Transmission Control - Without 3.5
550-918T - Terminator X Max LS2/LS3 and Late 58x/4x LS Truck Kit with Transmission Control - Without 3.5
550-918T - Terminator X Max LS2/LS3 and Late 58x/4x LS Truck Kit with Transmission Control - Without 3.5
550-918T - Terminator X Max LS2/LS3 and Late 58x/4x LS Truck Kit with Transmission Control - Without 3.5
550-918T - Terminator X Max LS2/LS3 and Late 58x/4x LS Truck Kit with Transmission Control - Without 3.5
550-918T - Terminator X Max LS2/LS3 and Late 58x/4x LS Truck Kit with Transmission Control - Without 3.5
550-918T - Terminator X Max LS2/LS3 and Late 58x/4x LS Truck Kit with Transmission Control - Without 3.5
550-918T - Terminator X Max LS2/LS3 and Late 58x/4x LS Truck Kit with Transmission Control - Without 3.5
550-918T - Terminator X Max LS2/LS3 and Late 58x/4x LS Truck Kit with Transmission Control - Without 3.5
550-918T - Terminator X Max LS2/LS3 and Late 58x/4x LS Truck Kit with Transmission Control - Without 3.5
550-918T - Terminator X Max LS2/LS3 and Late 58x/4x LS Truck Kit with Transmission Control - Without 3.5
550-918T - Terminator X Max LS2/LS3 and Late 58x/4x LS Truck Kit with Transmission Control - Without 3.5
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Terminator X Max LS2/LS3 and Late 58x/4x LS Truck Kit with Transmission Control - Without 3.5" Handheld

GM LS 58x Crank, 4x Cam - 4.8/5.3/6.0 Truck Engines and LS2/LS3 - 4L60/4L80 Transmission Control, USB/CAN Tuning Cable

PART# 550-918T

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Terminator X ECU's are designed to be mounted with the LED's facing up.

Overview

Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley EFI at a budget-friendly price! Terminator X Max features real-time fuel learn, high impedance injector drivers, an integrated 1bar MAP sensor, and 4 programmable inputs and outputs. The inputs and outputs are ideal for electric fans, boost control solenoids, progressive nitrous control, and much more. Part number 550-918 also has 4L60 or 4L80 Transmission control. Terminator X Max comes fully loaded with base maps for common LS engine combinations to get you out of the garage and on the road/track fast. These Terminator X kits include a USB/CAN tuning cable instead of the 3.5" Handheld LCD, these kits require the use of the free Terminator X Software for initial setup. The Terminator X Software includes multiple base calibrations to choose from for either naturally aspirated or boosted engines. Also included is Holley EFI's industry-leading, easy to use software suite that allows full laptop access for advanced users. Whether you are building a budget beater or a boosted race car, Terminator X MAX has the features and technology you need at a price that won't break the bank!

Features:

  • Designed for GM LS 4.8/5.3/6.0 LS Truck Engines and LS2/LS3 with 58x Crank, 4x Cam and 4L60/4L80E transmissions, and EV6 Injectors
  • Real-Time fuel map learn, takes the guess work out of tuning your base fuel table.
  • High Impedance Injector Drivers will safely power most Stock LS injectors, and Holley EFI Injectors. Injector support chart provided in the instructions (Will not control Low Impedance Injectors)
  • All of the new Terminator X Max systems utilize the Bosch LSU 4.9 wideband to relay AFR information to the ECU for accurate reading and precise tuning control.
  • On-Board 1bar MAP sensor, is perfect for N/A or Nitrous engine combos. If your combination requires a 2+Bar, we recommend GM 12592525, and our adapter part number 558-416.
  • MAP Sensor vacuum hose adapters (1/8th – ¼ and 3/16ths)
  • 4 Inputs – 12v, Ground, 5v, and Frequency, for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake
  • 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, can be used for any custom tables you can dream up, 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 allowing you to configure your ECU and Tuning the engine in real time.
  • The compact ECU size allows you to mount it virtually anywhere. Remember, diagnostic LEDS must face up!
  • Plug and play compatible with more Holley EFI accessories such as; analog style gauges, shift lights, various modules, and coming soon, 12.3" digital dash support!
  • Free EFI Tuning Software for complete control of your Terminator X power plant
  • Includes: 58x/4x LS Engine Main Harness - EV6 Injector Harness - 4L60/4L80 Transmission Control Harness - Terminator X MAX ECU - ECU Main Power Harness - Bosch LSU 4.9 Wideband Oxygen Sensor - Input/Output Harness - and assorted vacuum adapters.

Specs

BrandHolley EFI
Crank Reluctor58x
Ignition TypeGM LS 58x
Injector ConnectorUSCAR (EV6)
Product TypeTerminator X Max LS MPFI
Terminator LS OptionsFuel, Spark, Transmission
Part Number550-918T

Tech Resources

Holley EFI Dealers
Do you need a custom kit built for your application? Do you need a system installed and tuned? Click here to find the Holley EFI dealer in your area!
Wiring Diagram
LS2 Main Harness
Terminator X ECU's are designed to be mounted with the LED's facing up.
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