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Sniper 4-Barrel Systems

Sniper 1 and 2-Barrel Systems

Ignition, Fuel Systems, and Accessories

Sniper EFI Selector

To ensure that you select the correct system for your application, we've built this easy to use tool to help you along the way. Simply pick your intake manifold flange type, power level, and aspiration type. Then, you'll be ready to bring EFI into range with Sniper EFI!

Sniper EFI Selector

4BBL - Shiny

  • 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)
  • 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!
  • 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
  • Patent Pending
View Holley Sniper EFI Self-Tuning Kit - Shiny Finish

Stealth 4150 - Black

  • Bolt on 4150 Flange Carburetor Replacement
  • Throttle body mounted ECU – no extra boxes to mount
  • Supports up to 650hp with Four 100 Lb/Hr Injectors!
  • All of the wiring exits below the rear fuel injector cover, for a completely stealth installation.
  • Timed spark part for vacuum advanced distributors located under the front fuel bowl, for easy access to the distributor.
  • Air entry is machined to fit most stock style air cleaners with air cleaner locator provisions.
  • Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
  • External fuel pressure regulator required, set to a base pressure of 58.5 PSI, such as 12-886.
  • Integrated ignition timing control
  • 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 real-time Fuel Map Learn!
  • OEM Style TPS/IAC, 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
  • Available in 3 finishes: Shiny, Black and coming soon, Gold
View Holley Sniper Stealth 4150 - Black Finish

2300 - Gold

  • 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
View Holley Sniper EFI 2300 Self-Tuning Kit - Classic Gold Finish

Quadrajet - Gold

  • Available in 3 Finishes - Classic Gold, Shiny and Black Ceramic
  • Designed to deliver the signature Rochester Roar at Wide Open Throttle!
  • Throttle body mounted ECU – no extra boxes to mount
  • Supports up to 500hp with Four 100 Lb/Hr Injectors!
  • Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
  • Integrated ignition timing control
  • Transmission provisions on throttle lever for TH350/TH400 and 200R4/700R4
  • Fits most stock Rochester Quadrajet™ (Q-Jet) air cleaners
  • Brake Booster adapter included, if required
  • Universal Throttle and transmission kickdown bracket included
  • 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 Throttle Position Senser (TPS)/ and Idle Air Control (IAC) 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
  • Requires external fuel pressure regulator, such as: 12-886 or 12-879
  • 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
View Holley Sniper EFI Rochester™ Quadrajet® (Q-Jet™) - Classic Gold Finish

The same ECU technology that powers these...
can power your car!

Highlights

  • 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)
  • 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!
  • 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
  • Patent Pending

Sniper EFI Quick Reference Guide

Sniper EFI Horsepower (Naturally Aspirated) Horsepower (Power Adder) Injectors (100LB/HR) Boost Control Barrels CFM Fuel Pressure Regulator Available as Master Kit
4150 Sniper EFI6505754No4 800 @ 1.5" HgIncludedYes
Super Sniper 6506505754Yes4 800 @ 1.5" HgIncludedNo
Super Sniper 125065012508Yes4 800 @ 1.5" HgIncludedNo
Sniper 2x4 4150125012508No2X4 1600 @ 1.5" Hg Not IncludedNo
Super Sniper 2x4 4150125012508Yes2X4 1600 @ 1.5" Hg Not IncludedNo
Sniper Xflow8006904X120Yes4 900 @ 1.5" Hg Not IncludedNo
Sniper XFlow 137580013758X120Yes4 900 @ 1.5" Hg Not IncludedNo
Sniper EFI 23003502852No2 580 @ 3" Hg IncludedYes
Super Sniper 23003506504Yes2 580 @ 3" Hg IncludedNo
Sniper EFI BBD 3502852No2 370 @ 3" Hg IncludedYes
Sniper EFI Small Bore 2GC3502852No2 370 @ 3" Hg IncludedYes
Sniper EFI Quadrajet5005754No4 715 @ 1.5" Hg Not IncludedYes
Sniper EFI Stealth 4500150012508Yes4  1440 @ 1.5" Hg Not IncludedNo

Standard Sniper EFI Features!

  • Self Learning
    Means you don't have to be a computer/tuning wiz to have EFI!
  • Integrated ECU
    Eliminates the need of mounting an external box, saving you time and money.
  • Timing Control
    Provides optimal idle stability, and throttle response, and maximizes the output potential of your powerplant.
  • Fan Control
    Eliminates the need for an external fan controller, simply wire a relay to power your fan, and let the ECU trigger the relay at the desired coolant temp.
  • Boost Compatible
    Advanced boost control allows you to huff as much pressure into the engine as you require, while allowing you to safely pull ignition timing, and add fuel.
  • Nitrous Control
    Built in Dry or Wet Progressive or Non-Progressive nitrous control allows you to bottle fed your engine without needing to add an external controller.
  • 3.5 in. LCD Display
    Serves as a tuner and a digital gauge display, all at the palm of your hand.
  • Laptop Tuneable (Free)
    For the advanced users, the Sniper EFI tuning software gives you complete control of your engine's performance.

Integrated ECU & Fuel Pressure Regulator!



Integrated ECU means less wiring and ease of installation!

The integrated Fuel pressure regulator simplifies plumbing/installation! No need to mount an external fuel pressure regulator!
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See More
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Availability
  • In Stock
?
CFM
  • 580
  • 715
  • 800
  • 870
  • 900
  • 1440
  • 1600
Finish
  • Black
  • Black Anodized
  • Black Ceramic
  • Classic Gold
  • Galvanized Steel
  • Gold
  • Powdercoated
  • Shiny
  • Silver
  • Stainless Steel
Flange Style
  • 2300
  • 4150
  • 4500
  • Dual Bolt Pattern
  • Spreadbore
Height
  • 2.80"
  • 3.28"
  • 3.85"
?
Injector Size
  • 100 lb/hr @ 58.5 PSI
  • 120 Lb/Hr @ 58.5 PSI
Inlet / Outlet Size
  • 3/4-16 Female O-Ring (AN 8)
  • 8AN
  • 9/16-18 Female O-Ring (AN 6)
?
MAP Sensor
  • 2.5Bar
  • 2Bar
Max Horsepower Rating
  • 350 Naturally Aspirated
  • 500 Naturally Aspirated
  • 650 Forced Induction
  • 650 Naturally Aspirated
  • 800HP Naturally Aspirated
  • 1250 Forced Induction
  • 1250 Naturally Aspirated
  • 1375 Forced Induction
  • 1500 Naturally Aspirated
Throttle Bore
  • 1.375 Primary / 2.00 Secondary
  • 1.4375
  • 2.125 inch
  • 85mm
  • 90mm
  • 92mm
  • 102mm
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    Sniper EFI

    Holley just brought EFI within range - introducing Sniper EFI! 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. Put an end to cold start issues, hesitations, vapor lock, and flooding.