Made in USA
550-511-5XD Holley Sniper 2 EFI - Black
InfoVehicle Info Needed
HOLLEYPART NUMBER: 510-550-511-5XD

550-511-5XD Holley Sniper 2 EFI - Black

$1,91195$2249.95You Save$338.00
ShippingShips on 09/10/2026
Lowest PriceLowest Price Guarantee

Systems w/5 in. Handheld
Holley Sniper 2 EFI
  • Black
  • Returnless Style Drop-In Module
  • Without PDM
  • 5 in. Handheld

    Holley 550-511-5XD Features:

    The #1 EFI conversion system just got better! Introducing Sniper 2 EFI - a self-tuning, easy-to-install, EFI conversion for common 4-barrel (4150 flange) style carburetors. We took everything that we learned from the original Sniper EFI system and added 14 new features that will make your EFI conversion more simple, reliable, and modern. Like all Sniper EFI systems, Sniper 2 is designed to work with the Sniper Ecosystem that includes Hyperspark ignition, complete fuel systems, multiple user interfaces/dash displays, and more.

    • All new design – the #1 EFI Conversion just got better!
    • Only four wiring connections required: Battery+, Battery-, Switched Ignition, and RPM
    • Calibration wizard only requires that you answer a few simple questions about your engine to create a base map and begin self-tuning – No laptop required
    • Supports up to 650hp naturally aspirated or 575hp on boost with four 100 lb/hr injectors
    • (NEW) Next generation ECU features improved RF noise and interference resistance (stands up to old car wiring, noisy alternators, faulty plug wires)
    • (NEW) Redesigned throttle shaft and plate geometry for a smoother throttle feel
    • Sniper 2 is Part of Sniper EFI Complete Ecosystem
    • Sniper 2 is compatible with the complete Sniper EFI Ecosystem that includes plug-n-play Hyperspark Ignition systems (coil, ignition box and distributor), fuel systems (fuel lines, fuel pump hangers), multiple displays and more
    • (NEW) Main harness includes plug-and-play HyperSpark distributor support, for integrated timing control, making your ignition setup hassle free
    • (NEW) Adaptors for other ignition types sold separately: 558-329 CD Box to Sniper 2, 558-330 MSD Pro Billet / Crank Trigger to Sniper 2
    • (NEW) Wide Variety of tuning and gauge display interfaces: from a 3.5-inch full color LCD Handheld, 5-inch Digital Dash, or the Bluetooth dongle, which allows you to connect either an iOS or Android based cell phone to your Sniper 2
    • (NEW) Optional Power Distribution Module (PDM) further simplifies wiring, especially when used in conjunction with an ignition system
    • Available with fuel system kits: a complete fuel system consisting of: 20 ft. of 3/8 in. Vapor Guard Fuel Hose, Fuel Pump, fuel pressure regulator, filters, necessary hardware, and bulkhead fitting to return fuel into the tank
    • Additional Features
    • (NEW) Integrated transmission kick down provisions for GM TH350/400, 200-4R/700R4 and Ford C4/C6 applications
    • (NEW) “Hidden Harness” wiring harnesses exits from the rear of throttle body for a clean appearance
    • (NEW) Inputs and outputs consist of: 2x Ground Inputs, 2x Ground Outputs, 1x TPS output (0-5v), and 1x Tach Output
    • (NEW) Redesigned injector connector for improved reliability
    • (NEW) Onboard contactless magnetic TPS sensor ensures an accurate TPS reading
    • (NEW) Next Generation mil-spec style M8 positive lock connector for CAN1 and CAN2 provides the latest in CAN bus technology for a simple yet robust connection
    • (NEW) Cast-in fuel crossover from the primary to secondary fuel rail
    • (NEW) Sniper 2 throttle bodies are serialized in house, which provides each unit a birth certificate for an improved customer service and warranty experience in the event of any unit needing to be inspected
    • The included genuine Bosch LSU 4.9 wideband oxygen Sensor provides real-time fuel map learning
    • 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
    • Patent Pending

      Emissions Note:

      This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

      CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

  • Part TypeFuel Injection System
    BrandHOLLEY
    Package Height9.7
    Package Width14.9
    Package Length26.3
    Weight23.0 PG
    Part CategoryPerformance Parts
    Handheld Included5 in. LCD
    Part FitmentDirect Fit
    Fuel Pump TypeReturnless
    Maximum Horsepower650 HP
    Vendor Part Number550-511-5XD
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews

    Items You Need

    556-154 Sniper EFI HyperSpark 2 Ignition Box

    HOLLEY

    556-154 Sniper EFI HyperSpark 2 Ignition Box

    Part Number : 510-556-154
    $41595
    556-152 Sniper EFI HyperSpark Ignition Coil [Black]

    HOLLEY

    556-152 Sniper EFI HyperSpark Ignition Coil [Black]

    Part Number : 510-556-152
    $6525
    565-301 Sniper EFI HyperSpark Distributor

    HOLLEY

    565-301 Sniper EFI HyperSpark Distributor

    Part Number : 510-565-301
    $47895
    565-304 Sniper EFI HyperSpark Distributor

    HOLLEY

    565-304 Sniper EFI HyperSpark Distributor

    Part Number : 510-565-304
    $47895
    Air Cleaner with Smooth Top 14 in. x 3 in. [Chrome-Plated]

    JEGS

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

    Part Number : 555-500074
    $5699$61.49
    You Save$4.50
    16" High-Performance Fan 12V

    SPAL

    16" High-Performance Fan 12V

    Part Number : 063-30102049
    $19500
    Throttle & Kickdown/TV Cable Bracket Fits 4150/4160 Carburetors

    JEGS

    Throttle & Kickdown/TV Cable Bracket Fits 4150/4160 Carburetors

    Part Number : 555-157310
    $3699$39.89
    You Save$2.90
    TH350 Kickdown Cable Bracket For Small Block Chevy Engine

    JEGS

    TH350 Kickdown Cable Bracket For Small Block Chevy Engine

    Part Number : 555-157312
    $1749$20.89
    You Save$3.40
    Universal Dual Return Spring Kit Made in the USA

    JEGS

    Universal Dual Return Spring Kit Made in the USA

    Part Number : 555-15225
    $899$9.69
    You Save$0.70
    Carburetor Throttle Cable Bracket

    HOLLEY

    Carburetor Throttle Cable Bracket

    Part Number : 510-20-88
    $4995
    20-93 Ford Transmission Hardware Kit

    HOLLEY

    20-93 Ford Transmission Hardware Kit

    Part Number : 510-20-93
    $2087
    Throttle Ball Assortment Made in the USA

    JEGS

    Throttle Ball Assortment Made in the USA

    Part Number : 555-157205
    $999$19.79
    You Save$9.80
    26-616 Analog-Style EFI Tachometer

    HOLLEY

    26-616 Analog-Style EFI Tachometer

    Part Number : 510-26-616
    $34995
    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!