1in Phenolic Carb Spacer Swirl Torque w/PCV

The TRANS-DAPT 1 inch Phenolic Carb Spacer with Swirl-Torque and PCV port is a precision carburetor spacer engineered to optimize air-fuel mixture distribution and improve combustion efficiency in small-block applications. Built from phenolic material—a thermosetting composite that resists heat and fuel degradation—this spacer maintains dimensional stability under the thermal stress of continuous engine operation while insulating the carburetor from extreme intake manifold temperatures.

The 1-inch thickness creates the critical carburetor setback necessary for proper air distribution across the intake manifold. The Swirl-Torque design imparts rotational motion to incoming charge air, promoting better atomization and cylinder-to-cylinder fuel delivery balance. The integrated PCV port routes positive crankcase ventilation directly from the block, eliminating external hose clutter and improving underhood appearance. This spacer includes all required gaskets and hardware, and the square-bore pattern ensures compatibility with most standard small-block carburetors.

Street and strip builders rely on phenolic carburetor spacers to address one of the most common intake manifold limitations: uneven fuel distribution that causes rich cylinders on one bank and lean cylinders on another. By thermally isolating the carburetor and creating consistent air motion, this spacer reduces cold-start hesitation, improves throttle response, and helps stabilize idle quality. It's a straightforward bolt-on modification that supports both naturally aspirated and mild forced-induction setups.

TRANS-DAPT has manufactured intake and carburetor components for over 40 years, and their spacer designs are recognized as industry-standard solutions for classic muscle cars, hot rods, and modern carbureted restorations. This is a foundational upgrade that pairs well with manifold tuning, jetting adjustments, and air-intake optimization.