Product Summary

Universal Fit, Throttle Body Injection Style

    Key Specs

    MFG. Part #550-518
    BrandHolley Sniper

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    Introducing Holley Super Sniper EFI! Looking to convert your blow thru carbureted turbo engine to EFI? Look no further. Holley offers a 650 HP four injector version for lower horsepower applications with a power adder or someone just needing additional sensor inputs. Did we mention the Super Sniper also has full nitrous control built-in? That's right, no need for a separate nitrous controller! Every Super Sniper EFI system also comes with a USB to CAN tuning cable, as well as free downloadable Sniper EFI Software to give you unlimited control of your engine. 



    • 650 HP version features four 100 Lb/Hr Injectors
    • Compatible with Draw-Thru or Blow-Thru forced induction applications
    • User-friendly Boost Control with handheld adjustability
    • Programmable Target Air Fuel Ratios per Boost level
    • 2.5 Bar MAP sensor included which safely works on applications up to 21.5 PSI
    • Built-in Single stage progressive nitrous control
    • Dry or Wet Nitrous Support
    • Progressive or Non-Progressive control strategies
    • Lean/Rich AFR Cutoff
    • Integrated ignition timing control for precise timing curves
    • Programmable inputs and outputs
    • Three Programmable 0-5V Sensor Inputs for Oil/Fuel/Dome or Nitrous Pressure Sensors
    • Six Programmable Ground Outputs
    • One +5v Reference Output - +5V Power Supply for 0-5v Sensors
    • One Sensor Ground – Ground supply for 0-5v Sensors
    • Internal fuel pressure regulator eliminates the hassle of plumbing an external fuel pressure regulator (Preset to 58.5 PSI) for N/A or Nitrous applications
    • Self-tuning ECU means you don’t have to be a computer/tuning wiz to have EFI!
    • Only 4 Wiring Connections Required! (Battery +, Battery-, Switched Ignition & RPM)
    • High-Resolution Full Color Touchscreen for initial Setup, Tuning, and Gauge Displays
    • Simple Calibration Wizard - NO laptop required!
    • The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides real-time Fuel Map Learn!
    • OEM Style TPS/IAC and fuel pressure regulator, for years of dependable service
    • Included clamp-on oxygen sensor kit ensures a leak-free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange
    • Throttle body mounted ECU – no extra boxes to mount
    • USB to CAN Communication cable included for easy laptop tuning of advanced controls
    • Dual Pattern bolt on carburetor replacement, designed to fit 4150 Flange & Spread Bore manifolds
    • Compatible with Holley EFI analog gauges and electronic dashes

    CARB Warning

    For race/ off road use or for use on pre-1966 vehicles.

    Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.


    MFG. Part #550-518
    BrandHolley Sniper
    Injection StyleThrottle Body
    User TunableYes
    Self TuningYes
    Injectors IncludedYes
    Injector Size100.00 lbs./hr.
    Intake Manifold IncludedNo
    CFM800 CFM
    Throttle Body IncludedYes
    Throttle Body MaterialCast Aluminum
    Venturi Quantity4
    Fuel Pump IncludedNo
    Fuel Rails IncludedNo
    ECM IncludedYes
    Wiring Harness IncludedYes
    Fuel Pressure Regulator IncludedYes
    MAP Sensor IncludedYes
    IAC Motor IncludedYes
    IAT Sensor IncludedNo
    TPS Sensor IncludedYes
    FinishTumble Polished
    Throttle Bore
    Venturi Diameter44.45mm
    NotesUser and self tuning.
    GTIN Code090127039663
    Sold in QuantityKit