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Your New Favorite Holley 550-511k Sniper Efi Master Limited Time 55% Off [jETZkLFN]

$63.99 $204.99 -69%

Holley 550-511K Sniper EFI Master Kit delivers all the benefits of self-tuning Fuel Injection at a great price! Perfect for street rods, muscle cars, off-road trucks, as well as nearly any carbureted vehicle.This Black Ceramic Holley Sniper EFI syste

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Holley 550-511K Sniper EFI Master Kit delivers all the benefits of self-tuning Fuel Injection at a great price! Perfect for street rods, muscle cars, off-road trucks, as well as nearly any carbureted vehicle.

This Black Ceramic Holley Sniper EFI system can simultaneously put an end to cold start issues, hesitations, vapor lock, and flooding. We also offer a full line of Sniper Hyperspark distributors, Sniper ignition boxes, and Sniper coils. Additionally, we have other ignition components to round out your ride with a complete Sniper EFI, Ignition, and Fuel system!

Upgrade to the Your New Favorite Holley 550-511k Sniper Efi Master Limited Time 55% Off [jETZkLFN] Kit and get the tactical accuracy of EFI today!

Your New Favorite Holley 550-511k Sniper Efi Master Limited Time 55% Off [jETZkLFN] Kit Features:

  • 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

What Our Customers Say

January 2, 2026

Absolutely no complaints!

Excellent product. Just go ahead and go and get it.

- Mair U..

January 2, 2026

Absolutely no complaints!

This is a really, really, really, really good buy.

- Tomos I..

January 2, 2026

Absolutely no complaints!

This is a top-quality, and an absolute must-have item.

- Osian Y..

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