Carb Spacer 4500 Tapered 4 Hole 1.00in

The Carb Spacer 4500 Tapered 4 Hole 1.00in from ALLSTAR PERFORMANCE is a precision intake manifold spacer designed to optimize carburetor positioning and engine breathing on 4-barrel carburetors. This spacer sits between your carburetor and intake manifold, creating critical air volume that improves fuel atomization and enhances throttle response. Whether you're building a street engine, bracket racer, or classic hot rod, a quality carb spacer is an often-overlooked upgrade that delivers measurable results in drivability and performance.

The tapered design of this spacer facilitates smooth air transition from the manifold to the carburetor body, minimizing turbulence and dead spots that rob horsepower. At 1.00 inch thick, it provides substantial plenum volume expansion without requiring a complete intake redesign—ideal for carburetors like the Holley 4500 series that benefit from increased air staging area. The four-hole pattern ensures precise bolt alignment and full sealing, while the tapered geometry reduces pressure drops across the junction. Constructed to OEM tolerances, this spacer integrates seamlessly with stock and performance manifolds alike, maintaining seal integrity under sustained engine loads.

Mechanics and engine builders rely on ALLSTAR Performance spacers for street applications, strip racing, and engine swaps where carburetor clearance and manifold compatibility are critical. The 1.00-inch height suits most intake configurations without fouling underhood components or requiring custom linkage modifications. Installation is straightforward: remove your carb, place the spacer with gaskets on top of your manifold, and reinstall. This bolt-on upgrade pairs perfectly with port-matched manifolds and tuned intake runners to maximize the efficiency gains already engineered into your cylinder head.