Instant Rebates
Call Our Support Line
24 Hours / 7 Days a Week!  
Same Day Shipping Before 11 PM ET
My Cart
Shop By Vehicle
Shop By
Close Menu
Shop By Vehicle
Top Categories
All Categories

All Categories

Free Catalog
E-Mail Signup
My Account
Track Order
Gift Certificates

Holley 550-511K

Sniper EFI Master Kit with Black Finish

Holley 550-511K


made in usa
jegs shipping
FREE Shipping
Easy Returns
Easy Returns
Lowest Price Guarantee
Lowest Price Guarantee
Holley 550-511K Sniper EFI Master Kit with Black Finish $1,249.95
Sniper EFI Master Kit
  • Sniper Self-Tuning Black Throttle Body
  • 3.5" Touch Screen
  • Fuel System Kit

  • Holley 550-511K 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; 40ft 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 650HP. The Self-Tuning ECU makes it an easy, no hassle way to get the most performance out of your vehicle without a laptop computer. With available shiny, black ceramic, or classic bronze throttle body finishes, the Sniper EFI kit also 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.

    550-511K - Holley Sniper EFI Self-Tuning Kits is rated 5.0 out of 5 by 2.
    Rated 5 out of 5 by from This kit has everything you need and then some. After install I followed the directions on the handheld computer. Once finished the fuel pump started going and then hit the key and it started. Drove around for a bit with no issues. Now just waiting for a download for the turbo to really open it up.
    Date published: 2017-03-20
    Rated 5 out of 5 by from Actually canceled the order. The delivery date got pushed out to 9 weeks. During which time I began doing research on LS ENGINE SWAPS. I then decided to do a swap and canceled my order. Will probably get the Holley install kit for the LS ENGINE and 4L60 E set up.
    Date published: 2017-06-26
    • y_2017, m_8, d_14, h_4
    • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0-hotfix-1
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_2
    • loc_en_US, sid_10001_10001_3578954, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
    • clientName_jegs
    Items You Need

    Before you leave us... Receive a free catalog or join our email list

    Sign up to receive our catalog or subscribe to our email list now to see our exclusive email only specials, new products, and offers!

    Request CatalogJoin Email List