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Holley Sniper EFI Self-Tuning Kit with Black Finish


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Sniper EFI Self-Tuning Kit with Black Finish
7 left in stock
Sniper EFI Self-Tuning Kit
  • Includes Handheld EFI Monitor
  • Black Ceramic Finish
  • Four Fuel Injectors
  • Free Shipping - Ships

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    550-511 is rated 3.0 out of 5 by 7.
    Rated 5 out of 5 by from Worth every penny This TBI system is EVERYTHING the sales write-up says. Work effortlessly and changed my '52 chevy with a 350 SBC into a very reliable car and way more fun to drive.
    Date published: 2022-05-16
    Rated 4 out of 5 by from Easy swap I got this to swap out my carb since I live in MN. It was really easy to install and tuning is relatively straight forward.
    Date published: 2021-02-08
    Rated 3 out of 5 by from Not again. Unit worked perfect and then it started flooding out. In a airboat up the river...you are up the river without a working carb. Stay with the tried and true carb on airboat motors.
    Date published: 2019-09-29
    Rated 2 out of 5 by from ECU Failure I’ve had this since March and I am on my third unit. Runs Great when working. The first problem was after about 1,200 miles when the ECU quit reading the temp. Therefore the A/F ratio was off and it couldn’t run right. The second time was after about another 1,800 miles when the unit started flooding the rear drivers side barrel because the ECU failed again.
    Date published: 2019-11-17
    Rated 1 out of 5 by from Nice I bought this 3 weeks ago spent 2 weeks on hold with holly teck the third week they told me to send it back for repair 2 weeks trouble shooting 100 bucks of other parts and labor to help Shipped it back at my expense been over a week finally got a email that they got it but no eta when it’s going to b returned Now I’m going to get back sometime I hope as a reputed unit when I paid new price my Jeep is done but sitting for over three weeks and no idea how much longer Kinda has me mad worked a year on this project now it just sits Also had to spend 27 bucks to get the full instructions all 74 pages holly don’t send then u have to go on line
    Date published: 2021-04-16
    Rated 1 out of 5 by from Ecu Failure My Ecu failed allowing the O2 sensor not to read causing a very rich condition. Wouldn’t recommend this to my worst enemy. Holley support was 0 help
    Date published: 2021-03-30
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    I have a 35 Chevy pickup rat rod and it has zoom or headers on it (8 individual exhaust pipes) .. will it work with an O2 sensor in one pipe???

    Asked by: heater4
    Holley 510-550-511 zoomies are not ideal for multiple reasons one being only a single sample for the sensor and short pipes cause inaccurate readings due to fresh air getting to the sensor, we would not advise zoomies
    Answered by: langus
    Date published: 2022-10-20

    Is this a complete kit?,meaning do i need any other parts such as fuel pump etc?

    Asked by: Flaco
    Holley 510-550-511 is not complete it will require a fuel pump lines and there is the optional ignition
    Answered by: langus
    Date published: 2022-10-07

    I have the Edelbrock fuel sump 36032. Will I still need to run a return fuel line to the tank?

    Asked by: Coach GAM
    No, you can use the Edelbrock fuel system with the Holley throttle body.
    Answered by: Rusty B
    Date published: 2018-08-07

    Does this system have the option of running a 4l80e transmission or do I need a separate programmer?

    Asked by: Chucker
    Yes, you will need a seperate controller for the transmission.
    Answered by: Rusty B
    Date published: 2018-07-17

    I have a 1991 Chevy 350 with factory TB. The heads are center bolt but they are not Vortec. What intake and spacer will I need to make the Sniper system work? Could you provide part numbers please?

    Asked by: 59 Apache
    You can use a standard 4 bbl intake like this one - https://www.jegs.com/i/Holley/510/300-64/10002/-1
    Answered by: Rusty B
    Date published: 2018-05-25

    I have a 93 Chevy TBI 454 can I use this system on this motor?

    Asked by: JONZ67
    Yes, you will need a different intake of an adapter for the TBI flange.
    Answered by: Rusty B
    Date published: 2018-05-17

    Will these kits work with turbochargers?Blow thru.

    Asked by: Bobz
    Yes you can use a blow through setup with mild boost, you will need to program the ECU for it.
    Answered by: Rusty B
    Date published: 2018-12-15
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