Product Summary

Universal Fit, Throttle Body Injection Style

    Rebates Available

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    Key Specs

    MFG. Part #35221
    Injection StyleThrottle Body
    Injector Size62 lbs./hr.
    Max Horsepower Rating550
    ECM IncludedYes
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    Need To Know

    Quick and Easy Returns

    Return Policy

    FiTech 35221 Details

    FiTech Go EFI Classic 550 HP Fuel Injection Systems with Force Fuel Systems

    FiTech Go EFI Classic 550 hp fuel injection systems with Force Fuel systems are a unique combination of that classic throttle body look and fuel injection upgrade convenience. This innovative classic design hides the injectors and has an externally mounted ECU so it can be mounted wherever you want to ensure a true carburetor look. The Force Fuel system helps quench its thirst with easy hookup and versatile mounting. FiTech Go EFI Classic 550 hp and Force Fuel system combos are perfect for everyday drivers, weekend street machines, and bracket racers.

    Features:

    • 4-Barrel Square Bore
    • Rated up to 550HP
    • High Quality Aluminum Throttle Body
    • Satin Black Finish
    • Force Fuel System
    • Self-Tuning ECU

    Includes:

    * FiTech Go EFI Classic 550 HP fuel injection systems
    * FiTech Force Fuel systems

    Rebates

    FiTech 10% Off Select Parts Labor Day Sale 2026

    FiTech 10% Off Select Parts Labor Day Sale 2026FitechLaborDay10%OffSale2026

    FiTech Fuel Injection is pleased to announce our Labor Day Specials, running from September 1, 2026, through September 30, 2026. For a limited time, customers can save over $350 on Ultra Port EFI systems and EFI Master Kits, making it the perfect opportunity to upgrade to modern fuel injection with improved performance and drivability. 10% off applicable parts. Sale prices are applicable only to purchases made within the specified sale period, from September 1, 2026, to September 30, 2026. No rainchecks or exceptions will be provided. Sale price is valid through September 30. Regular MAP Pricing will be reinforced on October 1, 2026. This sale cannot be combined with any other offers, discounts, or promotions. Co-ops will be honored.

    CARB Warning

    For race/ off road use or for use on pre-1966 vehicles.

    Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or 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.

    FiTech 35221 Specifications

    KEY SPECS
    MFG. Part #35221
    BrandFiTech
    Injection StyleThrottle Body
    Injector Size62 lbs./hr.
    Max Horsepower Rating550
    ECM IncludedYes
    GENERAL
    Carburetor Flange Type4-Barrel Square Bore
    Fuel Injection System TypeSingle 4-Barrel Throttle Body (4150 Flange)
    CFM850 CFM
    User TunableYes
    Self TuningYes
    Injectors IncludedYes
    Intake Manifold IncludedNo
    Metering StyleSpeed density
    EGRNo
    Throttle Body IncludedYes
    Throttle Body MaterialAluminum
    Throttle Body FinishSatin Black
    Venturi Quantity4
    Fuel Pump IncludedYes
    Calibration Module IncludedYes
    Wiring Harness IncludedYes
    Fuel Pressure Regulator IncludedYes
    Distributor IncludedYes
    MAP Sensor IncludedYes
    IAC Motor IncludedYes
    IAT Sensor IncludedYes
    TPS Sensor IncludedYes
    Use with Power AdderNo
    Venturi Diameter43.00mm
    Flow Rating340
    GTIN Code812061032209
    Sold in QuantityEach
    Transmission Controller IncludedNo
    Multi-Port Fuel Rails IncludedNo
    Timing Control CompatibleNo

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