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Sniper EFI Returnless Master Kit - Shiny

Part # 550-510D Be the first to write a review

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

Sniper EFI Returnless Master Kit - Shiny

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3

Emissions

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

See Emissions Details
Are you wanting to convert your carbureted vehicle to Sniper EFI, but don't like the idea of mounting an external fuel pump? We have the perfect kit for you. Look no further than Sniper EFI Master Kits, with a Returnless Retrofit Fuel Module. 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! When it comes to tuning.. simplicity is what we strive for. 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 Master Kit comes included with a fuel system that places a 340LPH fuel pump in the tank, which can easily be accomplished with basic hand tools. The Drop-in Master kits make plumbing your Sniper EFI installation as hassle-free as possible, simply cap the regulator on the Sniper EFI throttle body with the provided -6an cap, safely route the vapor guard fuel line along the chassis back to the diecast fuel hat, and the job is finished. Even though this kit comes with a returnless style fuel system, 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)
  • Patent Pending
  • Includes complete fuel system consisting of; Sniper EFI Retrofit Returnless Fuel Module; 20ft of 3/8" Vapor Guard Fuel Hose; 5 stainless steel hose clamps, a post filter, and various Earls fittings and caps.
  • 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!
  • Integrated ignition timing control & coil driver
  • Throttle body mounted ECU – no extra boxes to mount
  • No external fuel return line required!
  • 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
  • Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides realtime Fuel Map Learn!
  • Includes complete fuel system consisting of; Sniper EFI Retrofit Returnless Fuel Module; 20ft of 3/8” Vapor Guard Fuel Hose; 5 stainless steel hose clamps, a post filter, and various Earls fittings and caps.
  • Sniper Returnless Retrofit Fuel Module
  • Sniper Retrofit fuel module installs in any fuel tank from 7” to 12” deep to fit a wide variety of applications
  • Internal fuel pressure regulator eliminates the hassle of plumbing an external fuel pressure regulator (Preset to 58.5 PSI)
  • The low profile design is only 1.275" thick above the tank mounting surface for added clearance when needed
  • Sniper Retrofit fuel module installs in any fuel tank from 7" to 12" deep to fit a wide variety of applications
  • ¼" NPT ports for a wide variety of plumbing options
  • Die cast aluminum construction for corrosion resistance and long lasting good looks
  • Throttle body mounted ECU – no extra boxes to mount
  • Self-tuning ECU means you don’t have to be a computer/tuning wiz to have EFI!

About Holley Sniper EFI

Explore Sniper's high-performance fuel system products to build your affordable high-performance fuel system at Holley.com!

Accelerometer SupportNo
Air Metering StyleSpeed Density
Boost ControlNo
Brand Holley Sniper EFI
CAN-BUS SupportNo
CategoryAir and Fuel Delivery
CFM800
Coil Per Cylinder Ignition SupportNo
Datalogging SupportYes
Distributor IncludedNo
Dry Nitrous ControlYes
e85 SupportNo
EGT SupportNo
Emission Code3
FinishShiny
Flange Style4150, Dual Bolt Pattern
Forced Induction SupportYes
Fuel Filter IncludedYes
Fuel Hose IncludedYes
Fuel Injectors IncludedYes
Fuel Pressure58.5 PSI
Fuel Pressure Regulator IncludedYes
Fuel Pump Flow Rating340 LPH
Fuel Pump IncludedYes
Fuel Pump TypeIn-Tank
Fuel System TypeReturnless
Grade TypePerformance
Height3.28"
Ignition Timing ControlYes
Individual Cylinder Fuel CorrectionsNo
Injector Size100 lb/hr @ 58.5 PSI
Inlet / Outlet Size9/16-18 Female O-Ring (AN 6)
Intake Manifold IncludedNo
Knock Retard SupportNo
MAP Sensor2 Bar
Max Horsepower Rating650 Naturally Aspirated
Multi-Stage Nitrous ControlYes
Product TypeSniper EFI 4150 Master Kit
Progressive Nitrous ControlYes
Self-TuningYes
Throttle Position Sensor IncludedYes
Traction Control SupportNo
Transmission700R4/200R4, TH350
User-TuneableYes
Wet Nitrous ControlYes
UPC090127048719
Part Number550-510D
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
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!
Quickstart Guide
Quickstart Guide
Instructions for Part# 550-510K
Instructions for Part# 550-510K
Instructions for 19-360
Instructions for 19-360
Sniper EFI SD Card Contents
Sniper EFI SD Card Contents
This kit does not require a fuel return line, as the fuel pressure regulator is mounted in the tank.

Have a question about this product?

  • Question

    HI, Looking to install an EFI Sniper Kit including the return less in tank fuel pump. Do I need to purchase a different gas tank or will this unit replace the original pickup in the tank with no modifications.

    By TOM N. on January 15, 2020

    Answer
    Here are the instructions for the drop in fuel pump module. It does not replace your stock sending unit and does require modification to your fuel tank. https://documents.holley.com/199r11511.pdf
    Helpful?
  • Question

    Does this sytem not require a return line or is this a returnless system?

    By Ryan H. on July 24, 2019

    Answer
    https://documents.holley.com/199r11511.pdf The regulator is built into the fuel hat. So the return line isn''t required.
    Helpful?
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