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Holley Sniper EFI Self-Tuning Master Kit - Black Ceramic Finish 550-511K

SKU: 550-511K

Availability: In stock

Handling Time: 30 Days


Holley Sniper EFI Self-Tuning Master Kit - Black Ceramic Finish

Holley Sniper 4 Barrel Fuel Injection Conversion - Self-Tuning Master Kit + Handheld EFI Monitor - Black Ceramic Finish

Holley just brought EFI within range


  • 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)
  • Includes complete fuel system consisting of; 20ft of 3/8" Vapor Guard Fuel Hose, Fuel Pump, Filters, necessary hardware and bulkhead fitting to return fuel into the tank!
  • 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!
  • 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

Installation Note:


  • Brand: Holley Sniper EFI
  • CFM: 800
  • Emission Code: 3
  • Finish: Black
  • Flange Style: Dual Bolt Pattern
  • Fuel Pressure: 58.5 PSI
  • Height: 3.28"
  • Injector Size: 100 lb/hr @ 58.5 PSI
  • Inlet / Outlet Size: 9/16-18 Female O-Ring (AN 6)
  • MAP Sensor: 2Bar
  • Max Horsepower Rating: 650 Naturally Aspirated
  • Product Type: Sniper EFI 4BBL TBI Kit
  • Transmission: 700R4/200R4
  • Transmission: TH350
  • Warning: California Proposition 65