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550-1062 Terminator X Stealth 4150 EFI System for GM LS Engines with 58x Ignition [Gold Finish]
InfoVehicle Info Needed
HOLLEYPART NUMBER: 510-550-1062

550-1062 Terminator X Stealth 4150 EFI System for GM LS Engines with 58x Ignition [Gold Finish]

$2,03895$2399.95You Save$361.00
ShippingShips on 09/14/2026
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Terminator X Stealth 4150 EFI Systems
Terminator X Stealth 4150 EFI System
  • GM LS Engines with 58x Ignition
  • Terminator X ECU
  • 4150-Flange EFI Carburetor Replacement
  • (4) 100 lb./hr Injectors
  • 650 HP (Naturally Aspirated)
  • 600 HP (Forced Induction)
  • Gold Finish

    Holley 550-1062

    Features:

    • Kick down provisions for GM TH350, TH400, 200R4/700R4, and Ford C4/C6 transmissions
    • Plug-and-play integrated ignition timing control with the factory GM LS coil sub-harness and OEM coils - no external boxes or modules are needed
    • Four inputs (12 V, ground, 5 V, and frequency) for adding additional pressure sensors such as nitrous activation triggers or a trans brake - fuel and oil pressure inputs are pre-terminated
    • Four outputs (ground, PWM) for adding accessories such as fans, boost control, or nitrous control
    • Fits most stock-style air cleaners and has air cleaner locator provisions
    • Full-color high-definition (HD) touchscreen display for initial setup, gauge readouts, and tuning
    • Factory-style throttle position sensor (TPS) and idle air control (IAC)
    • The Bosch LSU 4.9 wideband oxygen sensor (O2) provides real-time fuel-MAP learning
    • All wiring exits below the fuel injector bowls for a clean and organized appearance
    • Easy step-up through the self-tuning Calibration Wizard - no laptop is required
    • Compatible with Holley EFI digital dashes, gauges, and fuel system accessories

    Note:

    • An external fuel pressure regulator is required (not included) - set base pressure to 58.5 PSI

    Emissions Note:

    This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

    CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

    • Unleash Your Engine's Hidden Potential with Terminator X Stealth

      Holley Terminator X Stealth electronic throttle body injection (TBI) systems will improve idle stability, drivability, and wide-open throttle response. Pre-calibrated TBI systems are available in your choice of a black, gold, or shiny finish with a full-color touchscreen and include everything you need for a simple, bolt-on installation.

      Also available in the X-Max version with transmission control.

    Part TypeFuel Injection System
    Product LineHolley Terminator X Stealth EFI Systems
    BrandHOLLEY
    Package Height9.5
    Package Width14.5
    Package Length25.5
    Weight11.5 PG
    Part CategoryPerformance Parts
    Wiring Harness IncludedYes
    Fuel Pump IncludedNo
    Power Adder CompatibleYes
    Throttle Body FinishGold
    Fuel Pressure Regulator IncludedNo
    QuantitySold as a kit
    Injectors IncludedYes
    Tps Sensor IncludedYes
    Intake Manifold IncludedNo
    Engine Make/SizeGM LS
    Self TuningYes
    Oxygen Sensor IncludedYes
    Injector Size (Lbs./Hr.)100
    Distributor IncludedNo
    Timing Control CompatibleYes
    Injection StyleEFI
    Iac Motor IncludedYes
    Map Sensor IncludedYes
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews

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