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Holley Sniper EFI Master Kit with Classic Finish


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Holley 550-516K
Sniper EFI Master Kit Sniper Self-Tuning "Classic" Bronze Throttle Body
  • 3.5" Touch Screen
  • Fuel System Kit
  • Free Shipping - Estimated to ship directly from the manufacturer on 07/16/21

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

    550-516K is rated 4.5 out of 5 by 13.
    Rated 5 out of 5 by from Holley sniper is freaking awesome , Product arrived fast and was a quality piece of equipment. Would definitely buy again
    Date published: 2021-06-09
    Rated 5 out of 5 by from So far so good !! I can't really give a fair rating to my sniper efi yet. It is still being installed in my 74 CJ5. I can say that my mechanic praised the quality of the kit components very highly, and after showing them to me, I have to say I'm very impressed. Being from Holley, I have no doubt that the sniper system will be great - miles better than my previous horrible FiTech system.
    Date published: 2021-06-08
    Rated 5 out of 5 by from Easy to install I installed this on my 32 ford with a 351w engine set up was easy once i increased idle speed so it would start and run did not like the fuel pump noise or whine so I installed a in tank pump based on recommendations from Holley tech works great fast throttle response
    Date published: 2021-04-26
    Rated 5 out of 5 by from Cranked immediately first turn Took me some time to install on my own. I took my time planning out where to run fuel lines and wires. I’m a novice mechanic and I took my time making sure everything was done correctly the first time. It took me probably 12 hours start to finish over a couple of days. Once it was all hooked up. I primed the fuel system for a few minutes, closed my eyes, and turned it over... cranked faster than it had ever had with the 25 year old 4160 Holley carb! the throttle response is amazing. For my application 1985 Chevy K10 with cruise control, I needed a throttle bracket extension to give the throttle cable more leverage on the bracket. It was very touchy and tough to ease the throttle open from 0. Haven’t installed the extension yet but the reviews Ive read say it will fix my problem.
    Date published: 2020-12-14
    Rated 5 out of 5 by from Nice upgrade 1969 Ford F100, 351W, C6 automatic. I followed the QUICKSTART MANUAL SNIPER EFI INSTALLATION INSTRUCTIONS. I have a Ready to Run distributer, so I did not use the sniper timing option. I used the radiator fan option. Installed the fuel pump, coolent sensor, and O2 sensor. I found a holder for the display, and mounted it to the dash. Much to my surprise, I started it up, and it ran great!
    Date published: 2020-05-14
    Rated 5 out of 5 by from The best money I have spent on my 55 chevy This is by far one of the best investments I've made to improve the reliability of my car. Easy to install.
    Date published: 2019-06-30
    Rated 5 out of 5 by from Say no to Carbs Installed 3 weeks ago.So far so good,install was easy needs to come with 90 deg AN fittings instead of straight.If you have a 14" round air cleaner bottom will not fit ,Jegs sells the special one that will fit.Set up was a breeze, so far has been flawless.Hope the reliability is there! I will never use a carb again.
    Date published: 2019-05-14
    Rated 5 out of 5 by from excellent upgrade I've had this installed for almost a month now, maybe only put 60-70 miles on it so far, but I am absolutely satisfied with this purchase. And I must add, if you have any problems or questions or concerns, the customer support that you receive is awesome. The throttle response and no more cold start issues or dieseling is well worth it alone, then add the reliability of Holley's reputation.......A+++
    Date published: 2019-05-07
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    I have an  350 vortec/700r4 what would be the best street intake manifold and brackets for 700r4 tv cable i seen on engine masters that the dual plane intake manifold caused fuel distribution problems so they went with a single plane and it worked great

    Asked by: Ocl23
    We have these single plane intakes, but they are designed for high RPM. https://www.jegs.com/i/Edelbrock/350/2913/10002/-1
    Answered by: Rusty B
    Date published: 2018-11-08

    Is there an adaptor for the kick down linkage for big block mopar to use on a 727 automatic trans.

    Asked by: Atd62
    The standard bracket and linkage from most carburetors will work on this EFI throttle body. Or a cable kit like this https://www.jegs.com/i/Lokar/625/KD-2727HT/10002/-1
    Answered by: Rusty B
    Date published: 2018-09-14

    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: 2020-08-09

    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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