1/2in Phenolic Ported Carb Spacer

The 1/2in Phenolic Ported Carb Spacer from TRANS-DAPT is a precision intake manifold accessory engineered for carburetor-equipped engines seeking improved air distribution and thermal management. This half-inch phenolic spacer sits between your carburetor and intake manifold, isolating heat transfer while optimizing fuel-air mixture delivery to each cylinder. Whether you're building a street engine, restoring a classic, or fine-tuning a competition carb setup, this spacer addresses one of the most overlooked performance details: intake charge density.

Constructed from phenolic material—a composite resin chosen for its superior insulating properties—the 1/2in Phenolic Ported Carb Spacer minimizes heat soak from the manifold into the carburetor, keeping fuel cooler and reducing vapor lock risk under sustained load. The ported design maintains precise fuel passage alignment, ensuring metering accuracy across all RPM ranges. Measuring 7.2 x 1.5 x 8.6 inches with a square bore configuration, it accommodates four-hole mounting patterns common to most domestic performance carburetors. Complete with gaskets and mounting hardware, installation requires no additional components—bolt it down and tune.

Serious mechanics and engine builders rely on carburetor spacers to stabilize idle quality, reduce flat-spot hesitation, and extend fuel system reliability during high-heat conditions. This TRANS-DAPT unit is particularly valuable in small-block and big-block applications where underhood temperatures climb quickly. At 0.9 lbs, the spacer adds negligible weight while delivering measurable gains in consistency and response. If your carbureted engine exhibits symptoms of heat-induced stumble, poor low-RPM atomization, or inconsistent jetting response, the 1/2in Phenolic Ported Carb Spacer addresses the root cause: thermal equilibrium between fuel delivery and manifold conditions.