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Holley Sniper EFI 2300 Self-Tuning Kit - Shiny Finish

Holley Sniper 2 Barrel Fuel Injection Conversion - Self-Tuning Kit + Handheld Display - Shiny Finish

PART# 550-849

5 customer reviews
$1,003.00   Suggested Retail
$901.95   Your Price
Estimated shipping date: 05/24/2021
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Starting at $80 a month with Learn More
United States Coast Guard Approved
Certified to ISO 8846, SAE J1171 Requirements


Holley just brought EFI within range! Introducing Sniper EFI 2300! It's perfect for any vehicle that came standard with a 2300 Holley Flange like some Fairlanes, Galaxies, Falcons, Comets, F100s, Javelins, Rebels, Mustangs, Thunderbirds, Cougars and more. It's economically priced so you can have all the benefits of EFI and still have money to finish or upgrade your ride! It also easily adapts to a square flange or Q-jet flange 4bbl intake with a Mr. Gasket adapter P/N 1933 (4150 Square Flange) or 1929MRG (Spread Bore). Bolt-on replacement for popular classic Holley Carburetors such as the 0-4412 or 0-7448. Put an end to cold start issues, hesitations, vapor lock, and flooding. Upgrade to Sniper EFI and get the tactical accuracy of EFI today!


  • Bolt on 2300 Flange Carburetor Replacement
  • Supports up to 350HP with Two 100lb/hr Injectors
  • Equipped with C4 / C6 Ford transmission kickdown lever as well as TH350, 400 and 700R4 provisions
  • Accepts many common 5 1/8" OEM or aftermarket air cleaner assemblies
  • Throttle body mounted ECU – no extra boxes to mount
  • Integrated ignition timing control
  • Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
  • Internal fuel pressure regulator eliminates the hassle of plumbing an external fuel pressure regulator (Preset to 58.5 PSI)
  • 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!
  • Self-tuning ECU means you don't have to be a computer/tuning wiz to have EFI!
  • The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides realtime Fuel Map Learn!
  • OEM Style TPS/IAC and Fuel Pressure regulator, for years of dependable service.
  • Included clamp-on oxygen sensor kit for 2.25" exhaust ensures a leak free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange
  • Sniper EFI Software free to download which allows for realtime tuning
  • Printable throttle body flange template included
  • 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
  • Patent Pending


BrandHolley Sniper EFI
Coast Guard ApprovedYes
Emission Code3
Flange Size2300
Flange Style2300
Fuel Pressure58.5 PSI
Injector Size100 lb/hr @ 58.5 PSI
Inlet / Outlet Size9/16-18 Female O-Ring (AN 6)
MAP Sensor2Bar
Max Horsepower Rating350 Naturally Aspirated
Product TypeSniper 2BBL EFI Kits
Ford C4/C6
Part Number550-849

Service Parts



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

Tech Resources

SniperEFI 2300 Application Guide
SniperEFI 2300 Application Guide
Ford transmissions may require Part Number 20-60 Ford Transmission Kickdown Spring & Bracket kit.


Have a question about this product?

  • Question

    Can this product be used for Turbo applications

    By Andrew S. on June 9, 2018

    It has a built in 2.5Bar MAP sensor, so yes. You will need to laptop tune the system however, the base calibrations are not setup for boost.
  • Question

    Hi, i have a old 4 cyl ford engine, im going to put a turbo in it, id like to workknow if this will as fine as NA engine, my goal is around 200hp.

    By Guilherme S. on March 23, 2018

    Providing that the intake has a 2300 throttle body flange, yes the system will work. We have tested them down to around ~100 HP.
  • Question

    Will this work on a 1966 Bronco with a 302 used for climbing steep hills? I probably get 45-50 deg inclines.

    By Ronald W. on June 9, 2020

    Yes, very well! Because this system operates with high fuel pressure, you will not experience any issues on the slopes as long as your fuel tank is baffled appropriately.
  • Question

    I''m getting ready to purchase the Holley Sniper 2V EFI question. It says to hook the power and ground directly to the battery. My battery is in the trunk, I''m assuming just run the power and ground to the trunk for this application?

    By Mike B. on April 2, 2020

    Yes, they need to be terminated at the physical battery posts, no matter where the battery is mounted. This allows the battery to absorb any voltage spikes and helps to protect the Sniper ECU.
  • Question

    Can the injectors be changed to accommodate a 500hp turbo motor? Or would using the sniper be more effect it is a ford 2.3 currently carbed

    By Justin S. on October 22, 2019

    We have a Super Sniper 2300 designed for higher horsepower forced induction applications.
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