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Holley Sniper EFI

Holley Sniper EFI Self-Tuning Master Kit - Classic Gold

Supports Up To 650HP - 3.5 in. Handheld Monitor - Return Fuel System

Finish

Fuel System Type

Part # 550-516K
50 Reviews

Holley Sniper EFI Self-Tuning Master Kit - Classic Gold

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3

Emissions

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

See Emissions Details
Holley's Sniper EFI Self-Tuning Master Kit is the best way to upgrade your car to fuel injection in a cost-efficient way with just 4 simple connections required. Take your build to the next level and take advantage of improved engine performance, better MPG's and easier starting. Featuring a throttle body mounted ECU with no extra boxes to mount and a dual pattern bolt on design built to fit 4150 flange & spreadbore manifolds. This kit supports up to 650hp naturally aspirated and 575hp boosted with four 100 Lb/Hr injectors! Sniper is designed to be installed at home in your garage or driveway with limited tools and the support of Holley's comprehensive installation manual and videos. When it comes to tuning.. simplicity is what we strive for. Our simple calibration wizard allows you to just answer a few questions about your engine and the system will begin self-tuning with no laptop required. You don't have to be a computer wiz or specialize in tuning to use a Sniper EFI system! Use the high resolution 3.5" full color touchscreen for tuning and gauge displays. The Sniper EFI Master Kit includes a complete fuel system consisting of; 20ft of 3/8" vapor guard fuel hose, fuel pump, filters, and all necessary hardware to return fuel into your tank. Additionally, you're getting a 4.9 wideband oxygen sensor with a leak free oxygen sensor, oem style TPS/IAC, fuel pressure regulator, all Stainless Steel T-Bolt clamps and a Stainless Steel weldable flange. Once you made your conversion to EFI, don't stop there! Sniper is an Ecosystem. This kit pair's seamlessly together with Holley's Sniper Hyperspark Ignition, Fuel System's, Air Cleaners, Throttle Body & Digital Dash to unlock the full potential of your build.

Features:

  • Dual Pattern bolt on carburetor replacement, designed to fit 4150 Flange & Spread Bore manifolds - (Spread Bore Sealing Plate Part #9006 is recommended)
  • 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!
  • Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
  • High Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays.
  • Supports up to 650hp with Four 100 Lb/Hr Injectors!
  • Throttle body mounted ECU – no extra boxes to mount
  • Includes complete fuel system consisting of; 20ft of 3/8” Vapor Guard Fuel Hose, 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
  • The included 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
Brand Holley Sniper EFI
CFM800
Emission Code3
FinishClassic Gold
Flange Style4150
Dual Bolt Pattern
Fuel Pressure58.5 PSI
Fuel System TypeReturn
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 EFI 4150 Master Kit
Sale CategoryAir and Fuel Delivery
Transmission700R4/200R4
TH350
UPC090127001493
Part Number550-516K
3

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


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
Quickstart Guide
Quickstart Guide
Instructions for Part# 550-516K
Instructions for Part# 550-516K
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

Have a question about this product?

  • Question

    I have a new engine that has not been fired. Can I install this on a fresh engine or should I do the break in with a carburetor?

    By Joshua H. on June 3, 2018

    Answer
    Breaking in a fresh engine build with a Sniper EFI TBI system is completely acceptable.
    Helpful?
  • Question

    Will this efi work on a LS 5.3 while using a MSD 6LS ignition system? I am currently running a edelbrock performer carb intake with 650 double pumper and a MSD 6LS ignition on a stock LM7 5.3 truck engine. Wondering if this will run correctly without having control over timing since ignition and fuel would be separate systems. Looking at this kit over the terminator systems because of price. Not looking to make a ton of power just a reliable cruiser.

    By Adam A. on September 9, 2019

    Answer
    No problem. We have plenty of customers doing this currently.
    Helpful?
  • Question

    Can you run 2 of them on 2x4 intake?

    By Curtis L. on March 14, 2018

    Answer
    You're looking for our 550-529 2x4 Sniper kit!
    Helpful?
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Some parts are not legal for use in California or other states with similar regulations.