Carburetor Spacer - 1in Cloverleaf - 4500

The Carburetor Spacer - 1in Cloverleaf - 4500 is a precision aluminum intake manifold spacer designed for high-performance carburetor applications requiring elevated intake plenum geometry. This component sits between your carburetor and intake manifold, fundamentally altering fuel charge temperature, atomization, and volumetric efficiency. Mechanics and engine builders rely on carburetor spacers to fine-tune air-fuel mixture distribution, improve throttle response, and unlock additional horsepower in naturally aspirated engines running Dominator-flange four-barrel carburetors.

Machined from lightweight aluminum in natural finish, this 1-inch thick spacer features the cloverleaf port design—a proven pattern that optimizes fuel distribution across all four cylinders by reducing manifold vacuum signal lag and enhancing cylinder-to-cylinder mixture balance. The 1-inch height provides measurable gains in intake runner velocity and cold-start enrichment control without requiring major carburetor recalibration. All gaskets and mounting hardware are included, eliminating guesswork during installation. At just 2.05 pounds, the spacer adds minimal inertial mass while delivering structural rigidity where it matters most in the fuel delivery path.

This carburetor spacer excels in street and strip applications where Dominator-flange carburetors are paired with oval-port or rectangular-port small-block and big-block heads. Engine builders targeting 350–500+ horsepower naturally aspirated platforms benefit most from the improved thermal isolation and mixture control that the cloverleaf design provides. Installation is straightforward: bolt the spacer between your existing manifold and four-barrel carburetor, torque fasteners to specification, and verify idle quality and transition response. Compatible with dual-plane and single-plane manifolds featuring Dominator bolt patterns, this spacer integrates seamlessly into both street cruisers and dedicated race engines.