Holley Sniper Stealth 4150 EFI Self Tuning Master Kit Black Finish
Highlights
- Complete Fuel System Kit
- Self Tuning ECU
- Supports 650 Horsepower
- Simple Install and Calibration
Holley Sniper Black Finish Stealth 4150 EFI Self Tuning Master Kit.
The Sniper Stealth 4150 EFI System (550871K) from Holley features four 100LB/HR Fuel Injectors capable of supporting up to 650 naturally aspirated HP or 600 HP on forced induction applications. Master Kits include a complete fuel system with an external fuel pressure regulator preset to 58.5psi, 20ft of 3/8" Vapor Guard Fuel Hose, Fuel Pump, Filters, and all necessary hardware and bulkhead fittings to return fuel into your tank!
Features and Benefits:
- Black finish
- Bolt on 4150 Flange Carburetor Replacement
- Throttle body mounted ECU
- Supports up to 650hp
- Includes high pressure fuel crossover line
- High Resolution Full Color Touchscreen
- Simple Calibration Wizard
- Self-tuning ECU
The Sniper Stealth 4150 ECU is capable of fuel map self-learning and ignition timing control, improving idle stability, drivability, and wide-open throttle horsepower! Did we mention that the Stealth 4150 also includes transmission kick down provisions for GM TH350/400, 200R4/700R4 and Ford C4/C6 applications? Plus, this EFI conversion is designed to look just like a carburetor so you can keep the stock looking appearance under the hood of your vehicle. All of the wiring exits below the rear fuel injector cover, for a completely stealth installation. Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM.)
Vehicle Fitment:
1965-1985 Mustang
1966-1977 Bronco
1948-1979 F100
1960-1987 C10
California Residents: Proposition 65 Warning
Related Categories: Mustang Parts, Mustang Engine, Mustang Fuel Injectors & Mass Air Meters, Ford Bronco Parts, Ford F-100 Parts
Only for use on pre-pollution controlled vehicles: This product can be used on vehicles that were manufactured before emissions control regulations were imposed. Pre-pollution vehicles are defined as:
- 1965 and older U.S. manufactured California certified vehicles
- 1967 and older U.S. manufactured federally certified vehicles

Vehicle Fitment
This product will fit the following Bronco years:
This product will fit the following C10 years:
- 1960,
- 1961,
- 1962,
- 1963,
- 1964,
- 1965,
- 1966,
- 1967,
- 1968,
- 1969,
- 1970,
- 1971,
- 1972,
- 1973,
- 1974,
- 1975,
- 1976,
- 1977,
- 1978,
- 1979,
- 1980,
- 1981,
- 1982,
- 1983,
- 1984,
- 1985,
- 1986,
- 1987,
This product will fit the following F-100 years:
- 1948,
- 1949,
- 1950,
- 1951,
- 1952,
- 1953,
- 1954,
- 1955,
- 1956,
- 1957,
- 1958,
- 1959,
- 1960,
- 1961,
- 1962,
- 1963,
- 1964,
- 1965,
- 1966,
- 1967,
- 1968,
- 1969,
- 1970,
- 1971,
- 1972,
- 1973,
- 1974,
- 1975,
- 1976,
- 1977,
- 1978,
- 1979,
This product will fit the following Mustang years: