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Product Summary

Universal Fit, Throttle Body Injection Style, Polished

  • Self-tuning EFI system for 4-barrel carburetors, designed for easy installation
  • Includes a new optional Power Distribution Module (PDM) to simplify wiring
  • Works within the Sniper Ecosystem, compatible with Hyperspark ignition, fuel systems, and multiple displays
  • Improved drivability with smooth cold starts, better fuel economy, and modernized performance
  • User-friendly setup wizard requires no laptop, and it supports engines up to 650hp naturally aspirated or 575hp with boost

Rebates Available

See rebate details
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Key Specs

Injection StyleThrottle Body
CFM800 CFM
Injector Size100 lb/hr @ 58.5 PSI
Max Horsepower Rating650
ECM IncludedYes
See more specs

Need To Know

Quick and Easy Returns

Return Policy

Holley Sniper 550-510-BXD Details

The Sniper 2 EFI is a self-tuning fuel injection system for 4-barrel carburetors, featuring easy installation, a new Power Distribution Module for simplified wiring, and compatibility with the Sniper Ecosystem, offering improved drivability, fuel economy, and modern convenience for classic vehicles.

  • Self-tuning EFI system for 4-barrel carburetors, designed for easy installation
  • Includes a new optional Power Distribution Module (PDM) to simplify wiring
  • Works within the Sniper Ecosystem, compatible with Hyperspark ignition, fuel systems, and multiple displays
  • Improved drivability with smooth cold starts, better fuel economy, and modernized performance
  • User-friendly setup wizard requires no laptop, and it supports engines up to 650hp naturally aspirated or 575hp with boost

Rebates

Holley Fuel Up Spring Savings Event 2026

Save 10% instantly on select products across the Holley family of performance brands during the annual Holley Fuel Up Spring Savings Event 2026. Instant rebate period has been extended and now runs from March 30, 2026 through April 19, 2026.

CARB Warning

For use on pre-1966 vehicles only

Emissions warning: this part only legal for sale or use in California if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. ++any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering there are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

Holley Sniper 550-510-BXD Specifications

KEY SPECS
MFG. Part #550-510-BXD
BrandHolley Sniper
Injection StyleThrottle Body
CFM800 CFM
Injector Size100 lb/hr @ 58.5 PSI
Max Horsepower Rating650
ECM IncludedYes
GENERAL
User TunableYes
Self TuningYes
Injectors IncludedYes
Intake Manifold IncludedNo
Metering StyleSpeed density
EGRNo
Throttle Body IncludedYes
Throttle Body MaterialCast Aluminum
Throttle Body FinishPolished
Throttle Body Flange Type4-Barrel Square Bore
Venturi Quantity4
Fuel Pump IncludedYes
Calibration Module IncludedYes
Wiring Harness IncludedYes
Fuel Pressure Regulator IncludedYes
MAP Sensor IncludedYes
IAC Motor IncludedYes
IAT Sensor IncludedYes
TPS Sensor IncludedYes
Airflow Rate800
ColorPolished
Throttle Body StyleThrottle Body Injection (TBI)
Throttle Body Barrels4-Barrel
Gaskets IncludedNo
Hardware IncludedYes
Flow Rating340
Sold in QuantityKit
Customer Impersonation Script