SKU: HVHST4150-4AL
MPN: ST4150-4AL
The 1in Street Sweep Carburetor Spacer from High Velocity Heads is engineered for street performance enthusiasts and builders seeking precise intake manifold tuning without major engine modifications. This aluminum spacer sits between your 4150-pattern carburetor and intake manifold, creating a tuning platform that optimizes fuel distribution, improves throttle response, and refines air-fuel mixing characteristics for small-block applications. Whether you're dialing in a carbureted V8 for weekend cruising or daily driving, this spacer delivers measurable gains in drivability by controlling charge velocity and reducing turbulence in the intake tract.
Machined from lightweight aluminum, the 1in Street Sweep Carb Spacer features a one-inch thickness that provides the ideal standoff height for most street engines—thick enough to dampen intake resonance and improve plenum flow dynamics, yet thin enough to maintain proper carburetor geometry and linkage clearance. The spacer's internal passages are precision-ported to match 4150 flange specifications, ensuring zero flow restrictions and seamless fuel atomization across the full RPM range. This design minimizes vapor lock potential while allowing cooler, denser air charges to reach the cylinders, which translates to improved combustion efficiency and cooler engine temperatures during sustained driving.
Street builders, vintage hot rod restorers, and stock-displacement performance tuners benefit most from this spacer when paired with quality intake manifolds and properly jetted four-barrel carburetors. Installation requires only carburetor removal, gasket replacement, and spacer positioning—no machine work or fuel system modifications needed. The aluminum construction resists corrosion and heat degradation, making it ideal for both long-term storage and high-mileage daily drivers. Verify your carburetor uses the 4150 flange pattern and confirm carburetor stud length accommodates the one-inch height before ordering to ensure perfect fitment and performance.
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