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Holley Sniper EFI

Holley Sniper EFI 4150 Super Sniper 650

650 HP Sniper EFI 4 Barrel Fuel Injection Conversion - Self-Tuning Kit + Handheld EFI Monitor - Black Ceramic Finish

Part # 550-519
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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.

Features:

  • 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
  • Advanced boost control is available via free Sniper EFI tuning software, including Boost vs RPM and Boost vs Time – Same popular boost control offered in Holley HP and Dominator EFI systems!
  • 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
  • Time or RPM based Timing Retard and much more!
  • 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 (Answer a few questions about your engine, and it creates the base map, then starts tuning on its own!) - 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 - (Spread Bore Sealing Plate Part #9006 recommended)
  • Certified to ISO 8846, SAE J1171 & United States Coast Guard Requirements for Ignition Protection & Fire Resistance. Making Sniper EFI the perfect choice for carburetor to marine fuel injection conversions!
  • A Flame Arrestor is REQUIRED for marine installations, such as part number, 720-1 or 720-13
  • Compatible with Holley EFI analog gauges and electronic dashes
  • Patent Pending
Brand Holley Sniper EFI
CFM800
Emission Code3
FinishBlack Ceramic
Height3.28"
Injector Size100 lb/hr @ 58.5 PSI
Inlet / Outlet Size9/16-18 Female O-Ring (AN 6)
MAP Sensor2.5Bar
Max Horsepower Rating650 Forced Induction
Product TypeSniper 4BBL TBI Kits
Transmission700R4/200R4
TH350
UPC090127039670
Part Number550-519
3

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

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition and that are not registered and that may never be used on the street

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

Have a question about this product?

  • Question

    What Sniper system would I use for a vortech supercharger on a SBF 331 Stroker?

    By Kyle S. on March 17, 2020

    Answer
    This kit will work up to about the 600hp range!
    Helpful?
  • Question

    Is the only difference between this and the 1250hp capable efi carb the injectors? Like could I purchase this but in the future buy bigger injectors for more hp?

    By Polo H. on March 3, 2020

    Answer
    The 1250 unit has 8 injectors, The 650 version only has 4, but the ECU also does not have the provisions for 8 injectors, and the casting is only machined for 4 injectors. We recommended purchasing the 1250 first if you think you will need more fuel flow than the 650 can offer in the future.
    Helpful?
  • Question

    This product is rated for 650 forced induction HP, but what is it rated for N.A.? Im assuming on a wet shot, the supported HP isnt as important as the nitrous shot is supplying the air and the fuel, correct?

    By Brian L. on February 26, 2020

    Answer
    Correct, it''s still limited to 650HP, this unit only has 4 injectors, which is the limiting factor. If you plan on running a wet kit, the horsepower potential will be determined by your nitrous jetting, for the most part. This throttle body won't support the airflow of something like a 632ci big block with a 300 kit. But if your goals are in the 600-700hp range with a wet kit, you will be just fine.
    Helpful?
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Some parts are not legal for use in California or other states with similar regulations.