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Holley 550-870K Sniper Stealth 4150 Self-Tuning Fuel Injection System Master Kit


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550-870K Sniper Stealth 4150 Self-Tuning Fuel Injection System Master Kit
SAVE $169.19
Sniper Stealth 4150 Self-Tuning Fuel Injection System Master Kit
  • 4150 Flange
  • Supports Up to 650 HP
  • 870 CFM
  • Controlled by 3.500 in. Touchscreen
  • (4) 100 lbs./hr Injectors
  • Complete Fuel System Included
  • Shiny Finish
  • Free Shipping - Estimated to ship direct from manufacturer on 03/29/24 , pending manufacturer availability. Learn More

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

    550-870K - Sniper EFI Stealth 4150 Self-Tuning Kits is rated 4.6 out of 5 by 5.
    Rated 5 out of 5 by from Easy install Installed in 2 days with fuel system and hyperspark. Awesome and easy to use!
    Date published: 2020-05-22
    Rated 5 out of 5 by from Work great I decided to try this Sniper System to help eliminate tuning a carb on new engine I installed in my Chevelle. I recommend you watch the install video a couple of times The manual is a on line PDF file and try to understand it all before installing. After reading and watching it is a easy operation. The wires are easy enough and I used a in tank fuel pump kit for my instal I chose that over drilling a hole in fuel tank for a fuel return line. Now I just drive and watch it tune itself. So far so good!!!!
    Date published: 2020-05-09
    Rated 4 out of 5 by from Works great System is great and easy to install the only problem is the kit is not complete it doesn’t come with the two into one fuel line you have to order it separate part # Holley 34-42 and it $124.00 which is no big deal but it says this is a master kit which should include everything. It cost me about two days wait time but I’m very pleased with it
    Date published: 2020-11-05
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    will this system work with Mopar 70 Dodge Charger 440 R/B engine and Torque Flight auto transmission ?

    Asked by: Jim Aldrich
    The Holley 510-550-870K should have no issues with a Dodge 440.
    Answered by: jshook
    Date published: 2023-06-29

    Will this work with a twin turbo setup

    Asked by: Joker
    The Holley 510-550-870K Stealth EFI is not for use with a turbo.
    Answered by: jshook
    Date published: 2023-06-07

    Just recently bought a 68' Camaro with an 03' 5.3 LS1 and late 90's t-56 transmission. Will this work for me?

    Asked by: Moto3838
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