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    1978-1988 Cutlass Holley EFI Terminator X Max Mpfi With Drive-By-Wire, EV1 Injectors with USB Tuning Cable 550-929T

    Ground Up Part #: HOL-550-929T

    Manufacturer Part #: 550-929T

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    Part Details Vehicle Fitment Reviews
    Take control of your LS engine with Holley EFI 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 IN 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:

    • For GM LS1/LS6 engines with 24x crank reluctor and a Drive-By-Wire Throttle Body, and EV1 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
    • Recommended Pedal part number - 10379038
    • 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.

    Manufacturer Part Number : 550-929T

    warning WARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov
    Emissions
    3

    This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles

    The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

    • 1965 and older U.S. manufactured California Certified vehicles
    • 1967 and older U.S. manufactured Federally Certified vehicles
    • 1967 and older Foreign manufactured vehicle

    WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

    The following vehicles are considered Emissions Controlled Vehicles:

    • 1966 and newer U.S. manufactured California Certified vehicles
    • 1968 and newer U.S. manufactured Federally Certified vehicles
    • 1968 and newer Foreign manufactured vehicle
    Brand
    Brand Logo Holley EFI
    Additional Information
    • SS396.com Part #: HOL-550-929T
    • Brand: Holley EFI
    • Manufacturer Part #: 550-929T
    • Sold As: Kits
    • Shipping Details: This item ships Ground.
    Vehicle Fitment
    Make Model Year Body Style
    Oldsmobile Cutlass 1978 -
    Oldsmobile Cutlass 1979 -
    Oldsmobile Cutlass 1980 -
    Oldsmobile Cutlass 1981 -
    Oldsmobile Cutlass 1982 -
    Oldsmobile Cutlass 1983 -
    Oldsmobile Cutlass 1984 -
    Oldsmobile Cutlass 1985 -
    Oldsmobile Cutlass 1986 -
    Oldsmobile Cutlass 1987 -
    Oldsmobile Cutlass 1988 -
    Installation Time
    Installation Time: Info Unavailable
    Installation Difficulty
    Installation Difficulty: Info Unavailable

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    I have a '66 SS396.
    I was happy with my last purchase (wire harness).
    Thank you.
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    April 4, 2025 by Marc R. (NJ, US)
    “Great the rep was very knowledgeable about all of the parts that I needed.”
    Customer Choice
    Used them in the past. Great company to do business with!!

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