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Holley Sniper EFI Self-Tuning Kit with Classic Finish


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Holley 550-516
More than 10 available
Sniper EFI Self-Tuning Kit
  • Includes 3.5" Touchscreen Handheld EFI Monitor
  • "Classic" Bronze Finish
  • Four Fuel Injectors
  • Free Shipping - Ships
    Save $10 off $150+, $20 off $250+, $40 off $500+, $100 off $1,200+ Orders. Promo Code: 2020SAVINGS exclusions apply

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    550-516 is rated 3.0 out of 5 by 2.
    Rated 5 out of 5 by from Great unit...one big lie in the description Well... I thought I'd build a sbc 350. Put stock vortec heads on it b/c they flow better and have center bolt holes like my 305 had so I could just order a long block and everything would swap...ordered an intake because I didn't want to put a tbi back on it and started with a street demon carb because they claim to be so good and it had a bolt on tps... well that review is on its own product page... point is I got the Sniper in the end b/c of the timing control and it seemed more refined than other bolt on tbi/efi systems and i apparantly suck at carbs. Hooked it up no problem. Wired it up no problem. Fired it up after having to update its internal software for the hyperspark stuff. It ran fine and hasn't given me any issues yet. I really like the handheld it has way more options than you can see in the manual. Issues: (Not nec holleys fault) The one sided style throttle brackets that bolt to the top of throttle body hit the throttle linkage and won't work so I bought a square carb plate style chrome one that mounts under the throttle body for 20bucks instead of the 60something I wasted for the other one. But you'll have stuff like that when doing custom stuff. Also had to buy a remote mount tps for the Trans because it says not to piggyback it. AccuLink has one that bolts to the rear carb bolt and hooks to the Trans kick down on the throttle linkage with an adjustable bar. It accepts old factory gm tps plug too...just in case you have an electronic trans.... It's been on and running for 5days and it fires right up everytime. Learns more everytime I drive it. BUT the lie is the venturi(s) are in a circle above the throttle plates not below like they say. You can watch videos of them. The gas comes out and puddles on top of the throttle plates while idling. Not much and maybe it's designed to work better that way but you Def smell gas all the time like any old carb.
    Date published: 2019-02-06
    Rated 1 out of 5 by from Holley is over rated Not good - - purchased a trottlebody - quit working after 2 day - - Holley techs didnt know what went wrong - Purchased another one - same deal - quit working after 2 days Holley techs cant figure it out - also tried a Holley distributor - had to send that back it didnt work - techs couldnt figure it out - Finally went with Fi-Tech - works perfect - Thanks Holley for letting me paid my mechanic 3 times to do 1 job.
    Date published: 2019-06-24
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    Hi, will the Holley Sniper EFI Self-Tuning kit allow you to control electronic radiator fans? Will it allow you to determine at which temperature the fans come on and at what temperature you can turn them off?

    Asked by: JayhawkRick
    Yes, this will allow you to control the electric fans, here is a link to the instructions - https://www.jegs.com/InstallationInstructions/500/510/510-550-516.pdf
    Answered by: Rusty B
    Date published: 2018-10-04

    Will work in a 1991 5.8l Cobra OMC marine motor with a 4 barrel Holley installed on it presently?

    Asked by: PitDr13
    This will work on the engine, but this is not marine certified if that is necessary.
    Answered by: Rusty B
    Date published: 2018-07-31

    Would this work on a 1962 3.5 L.  Oldsmobile 215 V8    That use to run a 400   4   Barrel  Holly carb  Or do they make a smaller size one like Fitech  Street  rated a 150 hp to 400 Hp 

    Asked by: Ozbloke
    As long as you have a square flange manifold flange or adapted to square flange you can use the Holley Sniper of the FiTech EFI systems.
    Answered by: Rusty B
    Date published: 2018-04-24

    Can you run two of these on a dual carb intake?

    Asked by: Jamesonrm
    Yes, It can be done, but will require some special tuning consideration.
    Answered by: Rusty B
    Date published: 2018-04-13

    Can you elaborate on what the necessary fuel deluver system consists of and what it does ? Is it intelligent or simply a fuel pump, regulator , and lines ? Thank you

    Asked by: Atl_nupe
    You can use a system like this - http://www.jegs.com/p/FITech-Fuel-Injection/FiTech-Go-EFI-Fuel-Command-Center/3525624/10002/-1
    Answered by: Rusty B
    Date published: 2018-03-22

    is there a vacuum port to run a cowl induction hood? got a 71' chevelle with functional cowl induction.

    Asked by: basicassbear
    There is a vacuum port on the base plate of this throttle body.
    Answered by: Jon Jegs Tech
    Date published: 2018-01-26

    Does it work with turbo (single mount) and what intake manifold do you suggest for a sbc 305?

    Asked by: Sankanyeah
    You can use it, however you will need special software for boost downloaded from holley.com - the intake can be http://www.jegs.com/i/JEGS-Performance-Products/555/513000/10002/-1 depending on the year of the engine.
    Answered by: Rusty B
    Date published: 2018-01-15

    Will this kit work with open headers?

    Asked by: Seeking knowledge
    Yes, as long as you have the o2 sensor mounted into the header collector it will work.
    Answered by: Seth W
    Date published: 2017-12-22
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