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Holley 550-865K

Holley Sniper EFI 2GC Self-Tuning Master Kit


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Holley Sniper EFI 2GC Self-Tuning Master Kit $1,249.95
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Sniper EFI 2GC Self-Tuning Master Kit
  • Bolt-On Self Tuning EFI Conversion
  • Rochester 2GC Small Bore Flange
  • Supports Up to 350 HP
  • Controlled by 3.500 in. Touchscreen
  • (2) Fuel Injectors
  • Complete Fuel System
  • Black Ceramic Finish
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    Holley 550-865K Details

    Master Kits


    • Fits select 1955-1969 GM Vehicles 
    • Bolt-on EFI kit that replaces Rochester 2GC Small Bore Carburetor
    • Self-tuning ECU requires no previous tuning knowledge or computer
    • Supports up to 350 HP with two 100 lb./hr injectors
    • Throttle body mounted ECU
    • Integrated ignition timing control
    • Only 4 required wiring connections  (Battery +, Battery -, Switched Ignition & RPM)
    • Internal fuel pressure regulator
    • High-resolution color touchscreen for setup, tuning, and gauge output displays
    • Bosch LSU 4.9 Wideband Oxygen Sensor provides real-time fuel map learn
    • OEM style TPS/IAC and fuel pressure regulator
    • Clamp-on oxygen sensor kit
    • Fuel kit contains 20 in. of hose, 2 filters, high-pressure EFI fuel pump, and required fittings
    • Sniper EFI Software is free to download which allows for real-time tuning and constant updates


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    Revive a Rochester-Equipped Chevy with Fuel Injection

    Holley has expanded its line of critically-acclaimed self-tuning EFI systems to include the Sniper EFI 2GC Unit. It’s perfect for 1955-1969 GM vehicles originally equipped with a Rochester 2GC Small Bore Carburetor. Sniper EFI 2GC kits are designed to support up to 350 HP. The self-tuning module makes it an easy, no hassle way to get the most performance out of your classic vehicle without a laptop computer. Just answer a few simple questions about your vehicle configuration and it creates the base map and then starts tuning on its own while you drive, no computer required.

    Items You Need

    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.