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


  • 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

Self-Tuning EFI Starting at $999
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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!

Put an end to cold start issues, hesitations, vapor lock and flooding!

Tech & Support

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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.