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Holley Sniper EFI

Holley Sniper EFI Self-Tuning Kit - Shiny - Factory Refurbished

Factory Refurbished - Supports Up To 650HP - 3.5 in. Handheld Monitor - No Fuel System

Part # FR550-510
5 Reviews

Holley Sniper EFI Self-Tuning Kit - Shiny - Factory Refurbished

3

Emissions

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

See Emissions Details
The Sniper EFI Factory refurbish process starts by stripping a used or blemish Sniper EFI throttle body down to the bare casting. From there, our highly trained factory refurbish technicians flow the original fuel injectors. If any injectors fail to meet our flow standards they are replaced with good injectors. All sensors are tested to ensure they accurately report critical engine data to the ECU. Finally, the Sniper ECU and 3.5" Touch Screen handheld are tested and updated with the latest firmware. This process ensures that our factory refurbished Sniper EFI systems are just as reliable as a new unit off the shelf. We include the following new parts; wiring harnesses, coil driver, wideband oxygen sensor, fuel pressure regulator, and any fuel system components that should be included in your kit. Holley's Sniper EFI is the absolute best way to upgrade your car to fuel injection with just 4 simple connections required. This 4-barrel system features a dual pattern bolt on design built to fit 4150 flange & spreadbore manifolds. 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. An afternoon in the garage and you will be enjoying improved engine performance, better MPG's and easier starting. Featuring a throttle body mounted ECU with no extra boxes to mount. Not exactly sure if you're going forced induction and/or naturally aspirated yet? No worries! This kit supports up to 650hp naturally aspirated and 575hp boosted with four 100 Lb/Hr injectors. After the simple installation it's time to let your Sniper begin the self-tuning process. Our user-friendly 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. Sniper EFI is part of a complete ecosystem! Your new Sniper 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. Complete your fuel injection journey by checking out our full offer of ignition, fueling and accessories!

Features:

  • Holley Sniper EFI Factory Refurbished throttle bodies may have scratches, blemishes, and other visual flaws from previous installation.
  • Injectors are flow checked
  • All sensors are tested
  • Self-tuning ECU means you don't have to be a computer/tuning wiz to have EFI!
  • 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!
  • Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
  • Throttle body mounted ECU – no extra boxes to mount
  • Supports up to 650hp with Four 100 Lb/Hr Injectors!
  • Dual Pattern bolt on carburetor replacement, designed to fit 4150 Flange & Spread Bore manifolds - (Spread Bore Sealing Plate Part #9006 is recommended)
  • New Internal fuel pressure regulator eliminates the hassle of plumbing an external fuel pressure regulator (Preset to 58.5 PSI)
  • Integrated ignition timing control & New coil driver
  • High Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays.
  • Available in base & master kits (Master kits include 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!)
  • 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
  • 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
  • ECU and 3.5" Touch Screen are tested and updated to latest firmware.
United States Coast Guard Approved
Certified to ISO 8846, SAE J1171 Requirements
Brand Holley Sniper EFI
CFM800
Coast Guard ApprovedYes
ConditionRefurbished
Emission Code3
FinishShiny
Flange Style4150
Dual 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
Model4150 EFI Conversion Throttle Body
Product TypeFactory Refurbished EFI
Transmission700R4/200R4
TH350
UPC090127069288
Part NumberFR550-510
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 for Part# 550-510
Instructions for Part# 550-510
Instructions for Part# 550-510
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
We have limited stock on this part and on rare occasion receive more orders that can be filled.  If the part is oversold, backorders will be canceled and all payments will be refunded.

Have a question about this product?

  • Question

    Does this come with everything to install or do I have to buy a fuel pump and whatever else is needed

    By Timothy T. on June 28, 2021

    Answer
    Thank you for contacting Holley Tech Service. This is the EFI kit only. I would recommend purchasing part #562-5 with it which would be our fuel system kit for our EFI systems. You can also add a "K" to the end of the part number for a full kit that comes with fuel hose, filter, and fuel pump.
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Some parts are not legal for use in California or other states with similar regulations.