1in Super Sucker Carb. Spacer - 4500

The 1in Super Sucker Carb. Spacer - 4500 is a precision intake manifold spacer engineered for high-performance carbureted engines seeking improved air distribution and throttle response. Designed by HIGH VELOCITY HEADS for serious engine builders and street performance enthusiasts, this spacer sits between your carburetor and intake manifold to optimize fuel-air mixture atomization. Whether you're tuning a classic muscle car, hot rod, or street engine, this accessory addresses a fundamental challenge: uneven carburetor signal distribution across multiple intake runners.

The 1-inch height creates additional plenum volume that allows fuel vapors and air to homogenize more thoroughly before entering the engine's cylinders, reducing rich-running conditions on outside runners and lean conditions on inside runners. This design principle—sometimes called "equal length plenum tuning"—dramatically improves throttle response and idle quality, particularly on dual-plane intake manifolds where signal imbalance is most pronounced. The spacer's aluminum construction weighs just 1.95 lbs, minimizing parasitic weight while maintaining structural rigidity under boost and high manifold vacuum. HIGH VELOCITY HEADS engineered this component specifically for the 4500-series platform, ensuring OEM-quality fitment and proven performance gains in real-world dyno testing.

Installation is straightforward for any mechanic experienced with carburetor removal: simply unbolt the carb, install new gaskets on both sides of the spacer, and bolt everything back down—no modification to existing components required. This 1in Super Sucker Carb. Spacer - 4500 performs best on engines with 350–500 cubic inches where manifold signal distribution most impacts driveability. Experienced builders report noticeable improvements in part-throttle response, cold-start quality, and fuel economy. Pair this with quality gaskets and a carb rebuild for maximum benefit, especially if your engine exhibits uneven cylinder heating or inconsistent jetting across the carburetor's circuits.