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Holley Terminator X Max LS1 24x/1x with DBW Throttle Body Control Kit 550-929T

SKU: 550-929T

Availability: In stock

Handling Time: 30 Days


Terminator X Max LS1 24x/1x with DBW Throttle Body Control Kit - Without 3.5" Handheld

GM LS 24x Crank, 1x Cam - LS1/LS6 Engines - EV1 Injectors - and Drive-By-Wire Throttle Body Control, USB/CAN Tuning Cable

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 550-929 also has Drive-by wire throttle body 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. The 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!


  • For GM LS1/LS6 engines with 24x crank reluctor and a Drive-By-Wire Throttle Body, and EV1 Injectors
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  • Real-Time fuel map learn, takes the guess work out of tuning your base fuel table.
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  • 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)
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  • 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.
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  • 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.
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  • MAP Sensor vacuum hose adapters (1/8th "¼ and 3/16ths)
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  • 4 Inputs "12v, Ground, 5v, and Frequency, for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake
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  • 4 Outputs "Ground, PWM - , for accessories such as; fans, boost control, nitrous control, IAC Kit, and More
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  • Boost Control "Boost vs Time, Boost vs Gear, Boost vs RPM, Boost vs Speed, Boost Safeties
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  • Nitrous Control "Single Channel of Wet or Dry, Progressive or Non-Progressive, Rich/Lean Safeties, and target Closed Loop AFR
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  • 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!
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  • 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
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  • Includes CAN/USB tuning cable allowing you to configure your ECU and Tuning the engine in real time.
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  • The compact ECU size allows you to mount it virtually anywhere. Remember, diagnostic LEDS must face up!
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  • 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!
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  • Free EFI Tuning Software for complete control of your Terminator X power plant
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  • Recommended Pedal part number - 10379038
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  • Includes: 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 - and assorted vacuum adapters.

Installation Note:Terminator X ECU's are designed to be mounted with the LED's facing up.
Designed to work with GM Throttle body P/N's - 12570790 and 12580760
Designed to work with GM Throttle Pedal P/N - 10379038


  • Brand: Holley EFI
  • Crank Reluctor: 24x
  • Ignition Type: GM LS 24x
  • Injector Connector: Jetronic / Minitimer (Bosch)
  • Product Type: Terminator X Max LS MPFI
  • Terminator LS Options: Fuel, Spark, Drive-by-Wire