Holley 550-511D Sniper EFI Returnless Master Kit Features:

• Dual Pattern bolt-on carburetor replacement, made to fit 4150 Flange & Spread Bore manifolds
• Self-tuning ECU for easy EFI without requiring advanced computer/tuning skills
• 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
• High-Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays
• Supports up to 650hp with Four 100 Lb/Hr Injectors!
• Throttle body mounted ECU – no extra boxes to mount
• Integrated ignition timing control & coil driver
• No external fuel return line is 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 real-time Fuel Map Learn!
• Includes a complete fuel system consisting of:
  • Sniper EFI Retrofit Returnless Fuel Module
  • 20ft of 3/8 in. Vapor Guard Fuel Hose
  • 5 stainless steel hose clamps, a post filter, and various Earls fittings and caps
• Sniper Returnless Retrofit Fuel Module:
  • Installs in any fuel tank from 7 in. to 12 in. 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
  • The innovative clamping system allows you to locate the module anywhere in the tank beside your existing sending unit
  • The clamping system allows you to rotate the unit 360 degrees for easier clocking of the plumbing and wiring locations under your ride
  • Die-cast aluminum construction for corrosion resistance and long-lasting good looks
  • ¼ in. NPT ports for a large variety of plumbing options

Holley S550-511D Sniper EFI Returnless Master Kit Note:

For Troubleshooting Tips setting up your New Holley Sniper EFI System, please see this helpful video from Holley Performance.

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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