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Holley Sniper EFI

Holley Sniper EFI 2x4™ - Gold

Sniper DUAL QUAD™

Part # 550-529 Be the first to write a review
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3

Emissions

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

See Emissions Details
Introducing Sniper EFI 2x4™! Looking to convert your draw-through dual carbureted blower engine to EFI? Do you want a Tunnel Ram setup with Sniper Dual Quad™? Look no further! The Sniper EFI 2x4 system from Holley features 8, 100LB/HR Fuel Injectors capable of supporting 1250 HP on both naturally aspirated and forced induction applications. The Sniper EFI 2x4 was designed for use on naturally aspirated engines, while the Super Sniper EFI 2x4 system was developed for both naturally aspirated and draw-through supercharged applications. Every Sniper EFI can be used with free downloadable Sniper EFI Software, giving you unlimited control of your engine.

Features:

  • Supports up to 1250 HP with Eight 100 Lb/Hr Injectors
  • Internal MAP Sensor
  • Integrated ignition timing control
  • Built in Single stage progressive nitrous control
  • Programmable Target Air Fuel Ratios & Ignition Timing per Boost level
  • Single Throttle body mounted ECU, with easy connections between the two throttle bodies – no extra boxes to mount
  • Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
  • Fits on intake manifolds with flange spacing between 6.43"-13.5" (Includes most Edelbrock Manifolds)
  • Requires an external fuel pressure regulator: P/N 12-848 up to 800 HP, 12-851 for 1000+ HP
  • 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 ensures a leak free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange
  • Patent Pending
United States Coast Guard Approved
Certified to ISO 8846, SAE J1171 Requirements
Brand Holley Sniper EFI
CFM1600
Coast Guard ApprovedYes
Emission Code3
FinishGold
Fuel Pressure58.5 PSI
Height3.28"
Injector Size100 lb/hr @ 58.5 PSI
Max Horsepower Rating1250 Naturally Aspirated
Product Type2x4 Sniper EFI
UPC090127062241
Part Number550-529
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
Supercharger and/or Intake Manifold not included. For fitment reference only.

Have a question about this product?

  • Question

    Is there any Restrictions regarding the type of Camshaft that can be used w/ this Set-up? For instance would a Mid-range (2500 -7500 rpm) Camshaft w/ a High Duration/High Lift profile be able to work w/ this Kit? Would the Customer have to provide the Specs on their Camshaft as well as Stall Speed and Rear Axle Ratios? My understanding was that "High/Long" Duration Camshafts do not work well w/ these Self Learning EFI Kits. Please let me know. Thanks! Dino

    By Dean K. on August 27, 2019

    Answer
    Anything under 8" of vacuum at idle in gear might require some laptop tuning. However, the software is free to download. Go to this link and scroll down until you see " Sniper EFI Software " https://www.holley.com/support/resources/#Fuel_Injection
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    Some parts are not legal for use in California or other states with similar regulations.