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550-874 Super Sniper Stealth 4150 Self-Tuning Fuel Injection System
InfoVehicle Info Needed
HOLLEYPART NUMBER: 510-550-874

550-874 Super Sniper Stealth 4150 Self-Tuning Fuel Injection System

$1,69195
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Super Sniper Stealth 4150 - 650 HP
Super Sniper Stealth 4150 Self-Tuning Fuel Injection System
  • 4150 Flange
  • Supports Up to 650 HP
  • 870 CFM
  • Programable Inputs/Outputs
  • Controlled by 3.500 in. Touchscreen
  • (4) 100 lbs./hr Injectors
  • Black Finish

    Holley 550-874 550-874 Super Sniper Stealth 4150 Self-Tuning Fuel Injection System Features:

  • Holley 4150 flange EFI carburetor replacement
  • Supports up to 650 naturally aspirated HP or 600 forced-induction HP using (4) 100 lbs./hr Injectors
  • 870 CFM flow rate
  • All system wiring exits below the rear fuel injector cover, for a complete stealth installation and appearance
  • 2.5 Bar MAP sensor
  • Integrated ignition timing control
  • Throttle body mounted ECU
  • (4) wiring connections required (Battery +, Battery -, Ignition, RPM)
  • High-resolution color touchscreen controller
  • Calibration wizard tunes ECU without the use of a computer or extensive engine tuning knowledge
  • Genuine Bosch LSU 4.9 wideband oxygen sensor provides realtime fuel map learn
  • OEM-style throttle position sensor (TPS) and idle air control (IAC)
  • 2.500 in. clamp-on oxygen sensor kit allows easy integration into older exhaust systems
  • (3) Programmable 0-5 V sensor inputs for oil, fuel, dome or nitrous pressure sensors
  • (6) Programmable ground outputs
  • (1) +5 V reference output
  • (1) Sensor ground
  • 3.280 in. overall height
  • -8 AN (3/4-16) female O-ring inlet/outlet 
  • Kickdown provisions for GM: TH350, TH400, 200R4, 700R4 Ford: C4, C6
  • Compatible with Holley Ultra XP Carburetor drop base air cleaners as well as most stock-style air cleaners with air cleaner locator provisions

    • Installation Notes:

    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

      Fuel Injection Performance with a Carb Appearance

      The Sniper EFI Stealth 4150 Self-Tuning Kits from Holley feature all the benefits of electronic fuel injection for a carbureted engine and are a perfect option for streetcars, race cars, off-road vehicles, or anything running up to 650 normally-aspirated or 600 forced-induction horsepower. These kits help eliminate the typical issues associated with carburetors such as cold starts, hesitations, flooding, and vapor lock. Designed to mimic the appearance of a classic Holley Ultra XP Carburetor, all wiring is hidden and comes out the back for a truly stealth-like installation. All units have provisions for popular GM and Ford automatic transmission kick-down brackets. Sniper Stealth kits are available in base kits or master kits that include a complete fuel system.

    Part TypeFuel Injection System
    Product LineHolley Sniper EFI Stealth 4150-Series Self-Tuning Kits 4-Barrel
    BrandHOLLEY
    Package Height9.3
    Package Width12.5
    Package Length14.5
    Weight12.7 PG
    Part CategoryPerformance Parts
    Wiring Harness IncludedYes
    Iat Sensor IncludedYes
    Venturi Quantity4
    Inlet Size-8 AN
    Intake Manifold IncludedNo
    Calibration Module IncludedYes
    Throttle Body Mounting Flange4150
    Distributor IncludedNo
    Injection StyleThrottle body
    Iac Motor IncludedYes
    Fuel Pump IncludedNo
    Throttle Body FinishBlack
    Outlet Size-8 AN
    Throttle Body IncludedYes
    Metering StyleSpeed density
    Fuel Pressure Regulator IncludedNo
    QuantitySold as a kit
    Injectors IncludedYes
    Tps Sensor IncludedYes
    Fuel Rails IncludedNo
    EgrNo
    Ecm IncludedYes
    Oxygen Sensor IncludedYes
    Injector Size (Lbs./Hr.)100
    Part FitmentSemi Universal
    Throttle Body MaterialCast Aluminum
    Airflow Rate (Cfm)870 cfm
    Map Sensor IncludedYes
    Package Qty1
    Package TypeEA
    Please click here to download the instructions PDF file
    Some parts are not legal for use in California or other states with similar laws / regulations
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