• Some orders may take longer to arrive due to shipper and supplier delays. Learn More.
Account Login
Gift Cards
Track Order
Help Center

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


made in usa

Product Q&A
View Now
Click image to zoom
Sniper EFI Self-Tuning Master Kit 550-511K with Black Finish
Sniper EFI Master Kit
  • Sniper Self-Tuning Black Throttle Body
  • 3.5" Touch Screen
  • Fuel System Kit
  • Free Shipping - Estimated to ship direct from manufacturer on 09/30/22 , pending manufacturer availability. Learn More

    Thank you! We will notify you when this product becomes available.


    Items You May Also Consider

    550-511K is rated 4.6 out of 5 by 21.
    Rated 5 out of 5 by from Jeggs rocks. I originally tried to get this directly from holley but they tond me it would be a few months until it shipped. Canceled the order saw Jeggs saying they had one in stock. Ordered it and it arrived in a few days.
    Date published: 2022-05-26
    Rated 5 out of 5 by from New tech/old school Great product, easy setup. Will buy it again. I installed it on a FE 390. Start ups are awesome and easy. Runs better, runs smoother.
    Date published: 2022-03-23
    Rated 5 out of 5 by from Sniper FTW I was a little intimidated but, I followed the directions to the letter and my old pile fired right up without touching the throttle. Also make sure you register for the warranty. Great quality piece!
    Date published: 2021-07-09
    Rated 5 out of 5 by from Holley sniper Replaced carb on a gm 350 marine engine. Wonderful product, hot and cold starts no problem!!! Research how to install properly on your individual Boat application. Instructions were clear and straight forward!!!! My boat engine is better than new!!!!!
    Date published: 2021-07-08
    Rated 5 out of 5 by from Great product Simple install engine cold starts and run awesome now
    Date published: 2020-02-15
    Rated 5 out of 5 by from Replaced a Carb Well after numerous issues with a Carb, I bought this unit. About a 2 day installation when I could work on it. Then setup, program, test and tune went just and described. So far SBC 350 is running good. Will try to get a tune setup on it to improve the overall performance of the unit with the motor setup.
    Date published: 2019-05-27
    Rated 5 out of 5 by from Significant performance improvement! I just had this sniper kit along with the matching fuel tank/pump system installed in my 1986 Monte Carlo with a 383 stroker engine and it made a significant performance improvement. The throttle response and acceleration are greatly improved! I am very impressed with this sniper EFI system.
    Date published: 2019-03-27
    Rated 5 out of 5 by from EASY!! Very easy to install. I put this on a 454 in my offroad Jeep and it gives me everything I want out of the motor. Instant start ups and throttle response. Runs off the coil on the HEI. clean wiring too.
    Date published: 2018-03-21
    • y_2022, m_8, d_10, h_20
    • bvseo_bulk, prod_bvrr, vn_bulk_3.0.32
    • cp_1, bvpage1
    • co_hasreviews, tv_5, tr_16
    • loc_en_US, sid_10001_10001_3578954, prod, sort_[SortEntry(order=RATING, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_jegs

    Is the fuel pump that is included in this kit an in-tank fuel pump or an inline fuel pump?

    Asked by: Ryan189
    This is an inline fuel pump.
    Answered by: Rusty B
    Date published: 2020-01-01

    Hi I have a 454 Chevy with a tunnel ram. I'm looking to see if you have a kit that works on this application and a price on that kit. Thank you

    Asked by: Michael442
    Yes, this is the recommended kit - https://www.jegs.com/p/FITech-Fuel-Injection/FiTech-Go-EFI-2x4-1200-HP-Power-Adder-Throttle-Body-Systems/3525641/10002/-1
    Answered by: Rusty B
    Date published: 2018-08-01

    Will this work on my stock 84 mustang GT it has a holly 4bbl

    Asked by: 84mustangman
    Yes, this will work on your Mustang GT.
    Answered by: Rusty B
    Date published: 2018-08-05

    I am using an msd distributor and msd box. Would this work with it?

    Asked by: Trent Bishop
    Yes, this will work with your MSD ignition.
    Answered by: Rusty B
    Date published: 2019-02-18

    I want to put this on a 84 k10, and was look at the sniper kit with the fuel kit included, doesn’t have a vacuum distributer, and is a California emmisions truck, what exactly do i need?

    Asked by: Kyle520
    This will work in your application, but is not CARB approved for use in California. A vacuum distributor will give better response and fuel mileage on a street driven vehicle.
    Answered by: Rusty B
    Date published: 2019-02-17

    Will this product work on a 5.7 V8 1994 GMC Sierra?

    Asked by: CGS0331
    This is not compatible with your stock components. It is meant to replace a carburetor on a 4-barrel intake in an older application.
    Answered by: Matt_B
    Date published: 2018-03-24

    Is there a way to make this work with a duel tank fuel system on an 80s chevy pickup?

    Asked by: Gregsc
    You will have to use 2 fuel pumps and switch between them.
    Answered by: Rusty B
    Date published: 2019-01-14

    will this work on my stock 72 chevy k20 cast iron intake manifold.Has the stock Rochester 750 quadrajet on it atm mid 80s 350 engine

    Asked by: stock72k20
    You will want to use a carburetor adapter to a 4 bbl square flange. http://www.jegs.com/i/JEGS-Performance-Products/555/15440/10002/-1
    Answered by: Rusty B
    Date published: 2018-03-08
    • y_2022, m_8, d_10, h_20CST
    • bvseo_bulk, prod_bvqa, vn_bulk_3.0.32
    • cp_1, bvpage1
    • co_hasquestionsanswers, tq_16
    • loc_en_US, sid_10001_10001_3578954, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_jegs

    Items You Need

    Easy Kits

    Recently Viewed

    Some parts are not legal for use in California or other states with similar laws / regulations

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.


    WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.