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    Sale!

    Holley Terminator X Max, GM LS1/LS2/LS6, DBW, EV6 | 550-932

    Vendor: Holley EFI
    Part Number: 550-932
    Save $250
    Sale Price $1,999.95 Regular Price $2,249.95

    Available to order. In-stock orders typically ship in 1 to 2 business days.

    Not sure it fits your vehicle?
    Email sales@berryperformancesales.com with your year, make, model and engine, and we'll help you check fitment before you order.
    Fast Fulfillment: In-stock orders typically ship within 1 to 2 business days.
    Free Shipping on Orders Over $99 | Excludes freight shipments
    International Shipping Available: email sales@berryperformancesales.com for a quote.
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    Terminator X Max gives GM LS1/LS6 engines complete fuel and spark control at a budget-friendly price, without the hassles of a cumbersome junkyard ECU tuning interface. Real-time fuel learn, high-impedance injector drivers, an onboard wideband oxygen sensor, and a full base-map library get the engine running quickly, while the 3.5-inch touchscreen handheld makes calibration approachable for first-time EFI builders.

    Key Features:

    • Built for GM LS1/LS6 engines with 24x crank reluctor, Drive-By-Wire throttle body, and EV6 injectors
    • Real-time fuel map learning removes guesswork from base fuel tuning
    • High-impedance injector drivers safely run most stock LS and Holley EFI injectors
    • Onboard Bosch LSU 4.9 wideband for accurate AFR reading
    • Integrated 1-bar MAP sensor, ideal for N/A or nitrous combos (2+ bar needs GM 12592525 and adapter 558-416)
    • Includes MAP sensor vacuum hose adapters (1/8"-1/4" and 3/16")
    • 4 programmable inputs (12V, ground, 5V, frequency) for sensors or activation triggers
    • 4 programmable outputs (ground, PWM-) for fans, boost control, nitrous, IAC, and more
    • Boost control vs. time, gear, RPM, or speed, with boost safeties
    • Nitrous control: single channel, wet or dry, progressive or non-progressive, with rich/lean safeties
    • Advanced custom tables (1D and 2D, including per-gear) for flex fuel offsets or custom safety tables
    • Onboard diagnostic LEDs for ECU power, engine run, wideband status, TPS calibration, crank/cam signal
    • 3.5" touchscreen handheld with calibration wizard, data-logging, and customizable gauge display
    • Plug-and-play compatible with Holley EFI gauges, shift lights, digital/pro dashes
    • Free EFI tuning software for full laptop control

    Specifications:

    • Engine: GM LS1/LS2/LS6
    • Crank Reluctor: 24x
    • Ignition Type: GM LS 24x
    • Injector Connector: USCAR (EV6)
    • Drive-By-Wire: Yes
    • Transmission Control: None
    • MAP Sensor: 1-bar, onboard
    • Handheld Included: Yes
    • Includes: 24x LS Engine Main Harness, EV6 Injector Harness, DBW Throttle Body Harness, Terminator X MAX ECU, ECU Main Power Harness, Bosch LSU 4.9 Wideband O2 Sensor, I/O Harness, vacuum adapters
    • Warning: California Proposition 65
    • Part Number: 550-932

    ECU mounts with LEDs facing up; designed for 6-pin GM throttle bodies (12570790, 12580760, 12629992, 12605109) and GM throttle pedal 10379038. Not recommended for marine applications, but suitable for off-road use in a safe, dry, heat-protected location.

    FAQ

    What LS engines is the 550-932 Terminator X Max built for?

    GM LS1/LS2/LS6 engines with a 24x crank reluctor and EV6 injectors.

    Does it control a drive-by-wire throttle body?

    Yes, this version includes Drive-By-Wire throttle body control.

    What wideband sensor is included?

    A genuine Bosch LSU 4.9 wideband oxygen sensor for accurate AFR feedback.

    How many programmable inputs and outputs does it have?

    4 programmable inputs and 4 programmable outputs for accessories like fans, boost control, and nitrous.

    Does it include a handheld for tuning?

    Yes, a 3.5-inch touchscreen handheld with a calibration wizard, data logging, and a customizable gauge display.

    Can it be used on a marine application?

    No, it's not recommended for marine use, but it can be used in off-road applications if mounted in a safe, dry, heat-protected location.

    Shipping Policy
    • Free shipping on orders over $99 (excludes freight shipments).
    • In-stock orders typically ship within 1 to 2 business days. Weekend and holiday orders are processed the next business day.
    • Orders ship from Defiance, Ohio and a nationwide network of warehouses and manufacturers.
    • Items showing an ETA are not in stock yet. ETAs come from the manufacturer and can change.
    • No P.O. Boxes. International orders need a shipping quote, so email us first.

    Read the full Shipping Policy

    Return Policy
    • 30-day return window from the ship date. Returns must be approved first; email sales@berryperformancesales.com with your order number.
    • Items must be unused, complete and in the original packaging.
    • A 20% restocking fee applies, and return shipping is paid by the buyer.
    • Not returnable: installed or modified parts, opened or used programmers and tuners, custom orders, Open Box, and Clearance or Final Sale items.
    • Damaged, defective or incorrect items must be reported within 48 hours of delivery with photos.

    Read the full Return Policy

    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

    By making a purchase from Berry Performance Sales, you acknowledge and agree to abide by the terms and conditions of these Policies.

    For any questions or concerns, please contact us — we’re always happy to help.

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