Made in USA
550-516 Sniper EFI Master Kit with Classic Finish
Product Discontinued
HOLLEYPART NUMBER: 510-550-516K

550-516 Sniper EFI Master Kit with Classic Finish

Currently Unavailable

This product is no longer available. Please call customer service for assistance at 1-800-345-4545.

EFI Self-Tuning Kits
Sniper EFI Master Kit Sniper Self-Tuning "Classic" Bronze Throttle Body
  • 3.5" Touch Screen
  • Fuel System Kit

    Holley 550-516K Sniper EFI Master Kit with Classic Finish Features:

    • Dual Pattern bolt-on carburetor replacement, made to fit 4150 Flange & Spread Bore manifolds
    • Simple Calibration Wizard - Answer a few questions about your engine, and it creates the base map, then starts tuning on its own with no laptop needed
    • Self-tuning ECU for easy EFI without requiring advanced computer/tuning skills
    • Only 4 Wiring Connections Required - Battery +, Battery -, Switched Ignition & RPM
    • High-Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays
    • Supports up to 650hp with Four 100 Lb/Hr Injectors!
    • Throttle body mounted ECU – no extra boxes to mount
    • Includes complete fuel system consisting of; 20ft of 3/8” Vapor Guard Fuel Hose, Fuel Pump, Filters, necessary hardware and bulkhead fitting to return fuel into the tank!
    • Internal fuel pressure regulator eliminates the hassle of plumbing an external fuel pressure regulator (Preset to 58.5 PSI)
    • Integrated ignition timing control & coil driver
    • The included Bosch LSU 4.9 Wideband Oxygen Sensor provides real-time Fuel Map Learn!
    • OEM Style TPS/IAC and Fuel Pressure regulator, for years of dependable service
    • Included clamp-on oxygen sensor kit ensures a leak-free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange

    Note: If using a Holley Dual Sync distributor, adapter harness p/n 510-558-493 is required to connect to the Sniper EFI.

    • Self-Tuning Fuel Injection Conversion

      The Holley Sniper EFI is a perfect option for street cars, muscle cars, and off-road vehicles. Eliminate typical carburetor cold starting issues, hesitations, flooding, and vapor lock forever. The Sniper EFI has four fuel injectors, dual bolt patterns to fit 4150 Flange and Spread Bore manifolds, and can support up to 650 HP. The Self-Tuning ECU makes it an easy, no-hassle way to get the most out of your vehicle without using a laptop computer; all you need to do is hook it up and drive! With the available shiny, black ceramic or classic bronze throttle body finishes, the Sniper EFI kit brings style under the hood.

      Show More

      The Holley Sniper EFI Self-Tuning Kits and Accessories are engineered for enthusiasts who want modern electronic fuel injection performance without the complexity of standalone tuning systems. Designed as a direct replacement for traditional carburetors, Holley Sniper EFI systems deliver improved drivability, precise air/fuel control, and consistent performance across a wide RPM range. Whether you’re upgrading a classic muscle car or refining a street performance build, these self-tuning EFI kits provide a streamlined path to reliable, high-efficiency fuel delivery.

      Carbureted engines often struggle with cold starts, altitude changes, and fluctuating air/fuel ratios. By switching to a self-tuning EFI conversion kit, builders gain real-time fuel adjustments that enhance throttle response, optimize combustion efficiency, and support increased horsepower and torque capacity.

      Performance Benefits & Key Features

      Holley Sniper EFI Self-Tuning Kits are designed with integrated fuel injectors, advanced ECU technology, and wideband oxygen sensor feedback to automatically adjust fuel delivery based on engine demand. Performance enthusiasts typically evaluate EFI systems based on horsepower support ratings, throttle body sizing, injector flow capacity, and compatibility with forced induction applications.

      These systems are capable of supporting a broad range of engine outputs, from mild small block builds to higher-horsepower street performance combinations. The self-learning capability simplifies installation and reduces the need for extensive manual tuning, making it ideal for enthusiasts who want improved performance without constant calibration.

      Additional benefits include enhanced cold-start reliability, smoother idle quality, and improved fuel efficiency compared to traditional carburetors. Durable materials and precision-engineered components ensure long-term reliability, even in demanding street or track conditions.

      Fitment, Compatibility & Applications

      Holley Sniper EFI Self-Tuning Kits and Accessories are compatible with a wide range of GM, Ford, and Mopar V8 platforms equipped with standard 4-barrel intake manifolds. Popular applications include Chevrolet Camaro, Chevelle, Nova, Ford Mustang, Dodge Challenger, and classic trucks configured for carbureted setups.

      These EFI conversion kits are ideal for street performance builds, pro-touring vehicles, daily drivers, and even light drag racing applications. Proper installation may require upgrades to the fuel system, including high-pressure fuel pumps and compatible fuel lines, to ensure optimal performance.

      If you’re ready to modernize your engine with reliable electronic fuel injection and self-learning performance, explore the Holley Sniper EFI Self-Tuning Kits and Accessories at JEGS and take your build to the next level with proven EFI technology designed for serious enthusiasts.

    Part TypeFuel Injection System
    Product LineHolley Sniper EFI Self-Tuning Kits and Accessories
    BrandHOLLEY
    Package Height9.8
    Package Width15.0
    Package Length26.3
    Weight20.6 PG
    Part CategoryPerformance Parts
    Part FitmentSemi Universal
    Vendor Part Number550-516K
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews

    Items You Need

    120-510 Sniper EFI Air Cleaner Drop Base

    HOLLEY

    120-510 Sniper EFI Air Cleaner Drop Base

    Part Number : 510-120-510
    $4415
    Flexbraid Wire Cover Kit Temperature: -167ºF to 257ºF

    JEGS

    Flexbraid Wire Cover Kit Temperature: -167ºF to 257ºF

    Part Number : 555-10658
    $14799$159.99
    You Save$12.00
    565-305 Sniper EFI HyperSpark Distributor

    HOLLEY

    565-305 Sniper EFI HyperSpark Distributor

    Part Number : 510-565-305
    $51995
    565-306 Sniper EFI HyperSpark Distributor

    HOLLEY

    565-306 Sniper EFI HyperSpark Distributor

    Part Number : 510-565-306
    $51995
    565-301 Sniper EFI HyperSpark Distributor

    HOLLEY

    565-301 Sniper EFI HyperSpark Distributor

    Part Number : 510-565-301
    $47895
    565-302 Sniper EFI HyperSpark Distributor

    HOLLEY

    565-302 Sniper EFI HyperSpark Distributor

    Part Number : 510-565-302
    $47895
    565-303 Sniper EFI HyperSpark Distributor

    HOLLEY

    565-303 Sniper EFI HyperSpark Distributor

    Part Number : 510-565-303
    $47895
    565-304 Sniper EFI HyperSpark Distributor

    HOLLEY

    565-304 Sniper EFI HyperSpark Distributor

    Part Number : 510-565-304
    $47895
    565-308 Sniper EFI HyperSpark Distributor

    HOLLEY

    565-308 Sniper EFI HyperSpark Distributor

    Part Number : 510-565-308
    $51995
    556-151 Sniper EFI HyperSpark Ignition Box

    HOLLEY

    556-151 Sniper EFI HyperSpark Ignition Box

    Part Number : 510-556-151
    $41595
    556-152 Sniper EFI HyperSpark Ignition Coil [Black]

    HOLLEY

    556-152 Sniper EFI HyperSpark Ignition Coil [Black]

    Part Number : 510-556-152
    $6525
    Air Cleaner with Logo 14 in. x 3 in. [Chrome-Plated]

    JEGS

    Air Cleaner with Logo 14 in. x 3 in. [Chrome-Plated]

    Part Number : 555-50022
    $5299$58.99
    You Save$6.00
    558-493 EFI to Dual Sync Distributor Ignition Harness

    HOLLEY

    558-493 EFI to Dual Sync Distributor Ignition Harness

    Part Number : 510-558-493
    $4995
    Wire Crimping Pliers and Stripping Tool

    JEGS

    Wire Crimping Pliers and Stripping Tool

    Part Number : 555-80575
    $1399$15.99
    You Save$2.00
    Sure Grip Cut & Pull Wire Stripper

    JEGS

    Sure Grip Cut & Pull Wire Stripper

    Part Number : 555-80573
    $1999$21.99
    You Save$2.00
    Fuel Stabilizer 15oz Bottle

    LUCAS OIL

    Fuel Stabilizer 15oz Bottle

    Part Number : 639-10302
    $1128

    ITEM YOU MAY ALSO CONSIDER

    Some parts are not legal for use in California or other states with similar laws / regulations
    p65 warning
    Your Cart

    Your shopping cart is empty!