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Sniper EFI Self-Tuning Master Kit | Holley EFI (550-510D)


4150 Flange Carb Replacement/Handheld Monitor/EFI Hose/Fuel Pump/Post And Pre Fuel Filters/Return Bulkhead/Fittings/Hardware - Polished Finish

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Holley EFI - Sniper EFI Self-Tuning Master Kit P/N 550-510D Features:

  • Throttle Body Mounted ECU
  • Supports Up To 650HP w/Four 100 lb/hr. Injectors
  • 4 Wire Vehicle Connection Battery/Switched Ignition/RPM
  • Calibration Wizard No Laptop Required
  • Self-Tuning ECU Means You Dont Have To Be A Computer/Tuning Wiz
  • No External Fuel Return Line Required
  • Incl. Retrofit Returnless Fuel Module/20ft. Vapor Guard Fuel Hose
  • Incl. 5 Hose Clamps/Post Filter/Earls Fittings and Caps
  • Bosch LSU 4.9 Wideband O2 Sensor Provides R

Below is an abbreviated list of applications for the Sniper EFI Self-Tuning Master Kit.


Holley is quickly becoming The New Standard In EFI! Holley's HP ECU is standard equipment on the 2013/2014 Chevrolet COPO Camaro and Holley's EFI throttle body powers every NASCAR Sprint Cup Series(TM) team. Top racers are making the switch to Holley EFI every day. Racers like Tom Bailey who set three new records and took the overall event win on the 2013 Hot Rod Magazine Drag Week and John Scali who used it to win the 2013 JEGS All Star race. But that's not all. The world's best street machine builders and tuners are making the switch to Holley EFI. Builders like Dave Lane who used Holley EFI to power the 2013 Goodguys Hot Rod of the Year and tuners like Steve Morris who use it to build some of the baddest forced induction beasts on the planet. It's the easiest, most refined, feature-rich system that money can buy. But, don't take our word for it, see what the best are saying about Holley EFI!


  • 550-510D
  • 550-510D
  • 090127048719
  • Holley EFI
  • New

Shipping Information

  • Item Requires Shipping
  • 20.0 lbs.
  • W14.5000” x H9.5000” x L25.5000”

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