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Holley Sniper EFI Self-Tuning Master Kit - Black Ceramic Finish

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

PART# 550-511K

13 customer reviews
$1,388.95   Suggested Retail
$1,249.95   Your Price
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Overview

Holley just brought EFI within range – introducing Sniper EFI master kits! It’s economically priced so you can have all the benefits of EFI and still have money to finish or upgrade the rest of your ride! Perfect for street rods, muscle cars, off road trucks or nearly any carbureted vehicle. The Sniper EFI master kit contains the most complete EFI fuel system on the market. Everything is included to completely plumb your fuel system including; 20 feet of 3/8” EFI Hose, in-line fuel pump, post and pre fuel filters, return bulkhead, and all of the necessary fittings and hardware. Put an end to cold start issues, hesitations, vapor lock, and flooding. Upgrade to Sniper EFI and get the tactical accuracy of EFI today!

Features:

  • Dual Pattern bolt on carburetor replacement, designed to fit 4150 Flange & Spread Bore manifolds - (Spread Bore Sealing Plate Part #9006 is recommended)
  • Throttle body mounted ECU – no extra boxes to mount
  • Supports up to 650hp with Four 100 Lb/Hr Injectors!
  • Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
  • • Includes complete fuel system consisting of; 20ft of 3/8” Vapor Guard Fuel Hose, 12-920 Fuel Pump, Filters, necessary hardware and bulkhead fitting to return fuel into the tank!
  • Internal fuel pressure regulator eliminates the hassle of plumbing an external fuel pressure regulator (Preset to 58.5 PSI)
  • Integrated ignition timing control & coil driver
  • 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 ensures a leak free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange
  • Patent Pending

Specs

BrandHolley Sniper EFI
CFM800
Emission Code3
FinishBlack
Flange StyleDual Bolt Pattern
Fuel Pressure58.5 PSI
Height3.28"
Injector Size100 lb/hr @ 58.5 PSI
Inlet / Outlet Size9/16-18 Female O-Ring (AN 6)
MAP Sensor2Bar
Max Horsepower Rating650 Naturally Aspirated
Product TypeSniper 4BBL TBI Kits
Throttle Bore1.6875 (1 11/16ths)
Transmission700R4/200R4
TH350
Part Number550-511K

Service Parts


Emissions

This part is legal for use on Uncontrolled (Non-Emissions Controlled) Vehicles or Racing 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

Racing Vehicles are vehicles that are used exclusively for racing or other forms of competition that are not registered and that may never be used on the street.

Tech Resources

Quickstart Guide
Quickstart Guide
Instructions for Part# 550-511K
Instructions for Part# 550-511K
Holley EFI Dealers
Do you need a custom kit built for your application? Do you need a system installed and tuned? Click here to find the Holley EFI dealer in your area!
Sniper EFI SD Card Contents
Sniper EFI SD Card Contents

Q&A

Have a question about this product?

  • Question

    With this kit can you run a rough idle cam say a 108 lobe separation?

    By Michael B. on March 12, 2018

    Answer
    Generally anything over 7" of engine vacuum at idle in gear will "learn" without issues at idle. In combinations that product less than 7" of engine vacuum at idle in gear, we recommend using the free Sniper EFI tuning software to dial your idle tune in.
    Helpful?
  • Question

    Does this kit include wiring for the electric fuel pump including relays?

    By Vincent F. on April 27, 2018

    Answer
    Yes, the fuel pump relay is built into the Sniper EFI Main Harness.
    Helpful?
  • Question

    How specific with the cam specs do I need to be for the initial install? It is a mild aftermarket performance cam that was put into the motor prior to me buying it.

    By Christopher Y. on April 24, 2018

    Answer
    We recommend using the stock/mild selection if you are unsure of your camshaft specs.
    Helpful?
  • Question

    Do I need two o2 sensors sense I am running true fuel exhaust ? With the sniper 550-511k kit

    By Leonard H. on April 15, 2018

    Answer
    We only utilize one oxygen sensor with the Sniper EFI System. If you want to determine if your engine and intake manifold are distributing fuel evenly, you can swap the sensor to either side of the exhaust system for verification.
    Helpful?
  • Question

    Is there a specific distributor needed to run with the sniper EFI kit?

    By Karl H. on April 15, 2018

    Answer
    The most basic installation only requires a tach input to operate. This is generally provided by the negative side of your ignition coil. If you are seeking to utilize ignition timing control, then we recommend using one of our Holley EFI Dual Sync Distributors.
    Helpful?
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      *Free Shipping & Handling only offered to the contiguous US on orders over $100.

      Some parts are not legal for use in California or other states with similar regulations.

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