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Holley Sniper EFI Master Kit with Classic Finish

Holley 550-516K


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Holley Sniper EFI Master Kit with Classic Finish $1,249.95
Sniper EFI Master Kit Sniper Self-Tuning "Classic" Bronze Throttle Body
  • 3.5" Touch Screen
  • Fuel System Kit

  • Holley 550-516K Details

    EFI Self-Tuning Kits

    • Bolt on carburetor replacement (designed to fit single & dual carb manifolds)
    • Throttle body mounted ECU - no extra boxes to mount
    • Supports up to 650hp
    • 4 wire vehicle connection (Battery +, Battery - , Switched Ignition & RPM)
    • Includes complete fuel system consisting of; 20ft of 3/8" Vapor Guard Fuel Hose, 12-920 Fuel Pump, Filters, necessary hardware and bulkhead fitting to return fuel into the tank.
    • Integrated fuel pressure regulator
    • Integrated ignition timing control & coil driver
    • Color touchscreen for setup and gauge views
    • Calibration Wizard NO laptop required for this self-tuning ECU
    • The included Wideband Oxygen Sensor provides real-time fuel map learn

    Note: If using a Holley Dual Sync distributor, adapter harness p/n 510-558-493 is required to connect to the Sniper EFI.


    Manufacturer's Part Number:

    The Holley Sniper EFI Self-Tuning Kits feature all the benefits of EFI, a perfect option for street cars, muscle cars and off-road vehicles. Eliminate typical carburetor cold starting issues, hesitations, flooding and vapor lock. Sniper EFI four fuel injector kits can support up to 650 HP. The Self-Tuning ECU makes it an easy, no hassle way to get the most performance out of your vehicle without the use of a laptop computer, just hook it up and drive! With available shiny, black ceramic, or classic bronze throttle body finishes, the Sniper EFI kit brings style under the hood.

     JEGS Easy Kits are designed by JEGS high performance racing professionals to help you get all the performance parts you need for your race car, hot rod or truck.

    550-516K is rated 3.8 out of 5 by 4.
    Rated 5 out of 5 by from Every thing you need in one box Install and tuning are pretty easy with this setup
    Date published: 2018-01-01
    Rated 5 out of 5 by from EFI is always good Holly Sniper is easy to install and has great features. Installed it in a 1932 Chevy 3 window coupe. with small block Chevy motor.
    Date published: 2017-07-07
    Rated 4 out of 5 by from Good Investment I bought this kit about six months ago and have since put 5,000 miles (consisting of highway, town, and off road) on the system with out any issue. I installed the kit on a 1984 GMC Jimmy (full size), 350 motor, 700r4 trans. Everything you need to install the system comes with the kit. Instructions are very comprehensive and clear. The system fires right up, it takes no time to tune it's self to perfection. The system has never failed to fire up whether it be in 100 degrees outside or 30 degrees on the first turn of the starter. The only reason I did not give this product a full five stars is the the throttle bracket I received moved when the throttle was depressed preventing it from going WOT (TPS read %70). I have a QJ intake on it now, so I had access to both bolt holes in the bracket. I put a stud in to the other bolt hole and messed with the nut it until It tightened down. It was a tight fit and I think I just got lucky, I'm not looking forward to taking it back apart. Everything else is flawless, and if Holley fixes the bracket it will be an easy 5 star rating.
    Date published: 2017-09-07
    Rated 1 out of 5 by from Extremely disappointed I was not able to connect my auto transmission kick-down rod on my 69 Mach 1, to the Sniper EFI. Holley tech support sent me to Lokar for a cable and the connection hardware. Lokar advised me they may have a cable that could work, but they have no solution for my current kick-down rod connection problem or for the $85 cable they are willing to sell me. Lokar suggested that I would have to build my own connection hardware for either kick-down setup. When I called Holley/Sniper back they suggested that my Sniper EFI universal Master kit didn’t mean it would fit everything. This is very disappointing considering my current Holley carb setup has an available kit for kick-down cables and rods. If Holley would have included the kick-down kit mounting flange and hole this would have been a very simple fix. I’m not sure if only Chevy vehicles were tested by this product, but the Sniper EFI has no design consideration for Fords with auto transmission. Looks as if I will be building my own kick-down rod connection. My Jegs purchase experience was great as always!
    Date published: 2018-05-09
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    My 71 GMC PU has an in bed fuel tank with a top siphon tube running to the mechanical fuel pump/carb. Will this fuel pump draw from the top siphon tube with pump mounted flush to the tank bottom, I have the tank inside an aluminum tool box in bed. Thanks 

    Asked by: GMC C3500
    This is can draw a limited amount of fuel depending on the pickup tube.
    Answered by: Rusty B
    Date published: 2018-05-03

    can you pump e85?

    Asked by: Alexis88
    Yes you can, but you will need to change fuel values and be able to do laptop tuning.
    Answered by: BrandonJ
    Date published: 2017-11-15

    Will this work with a nitrous oxide Cheater plate system with a 150 shot.

    Asked by: WOODY73
    Yes a NOS Cheater Plate system made to fit Holley 4150/4160 flange carburetors will work with this.
    Answered by: Jegs Tech
    Date published: 2017-11-08

    I still have an (old) new-in-box Mallory Unilite for my SB (260) Ford. Will this be usable with the Sniper?

    Asked by: T Rex
    Yes, a Unilite distributor will work with the Sniper EFI system.
    Answered by: Rusty B
    Date published: 2017-10-19

    Will this kit work on an LS with holley dual plane carb intake manifold and MSD 6010 Box?

    Asked by: Keet
    Yes, this unit will work on that application.
    Answered by: Rusty B
    Date published: 2017-09-15
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    Items You Need
    Some parts are not legal for use in California or other states with similar laws / regulations