Intake Gasket - BBC BB-3 Extra 365cc (Each)

The Intake Gasket - BBC BB-3 Extra 365cc is a precision sealing component engineered for big-block Chevy applications requiring maximum flow and reliability. This gasket seals the critical junction between the intake manifold and cylinder head, preventing vacuum leaks, coolant seepage, and combustion gases from escaping into the engine bay. Whether you're building a street engine, bracket racer, or high-performance street car, a quality intake gasket is non-negotiable—it directly impacts idle quality, fuel economy, cold start performance, and overall engine efficiency. The BBC (big-block Chevy) platform demands gaskets that can withstand extreme combustion pressures while maintaining a perfect seal across a wide temperature range.

BRODIX manufactures this intake gasket to precise specifications that match the BB-3 Extra 365cc cylinder head architecture, ensuring zero-compromise fitment and durability. The gasket material is selected to resist deformation under sustained boost, high RPM, and thermal cycling—critical factors in forced-induction and naturally aspirated big-block builds alike. At just 0.08 lbs and measuring 3.3 x 0.75 x 22.35 inches, this gasket is designed to fit standard BBC intake manifold bolt patterns without requiring machine work. The engineered composition prevents blowby at the intake tract while maintaining chemical resistance to modern fuel additives and coolant formulations, extending service life far beyond standard OEM replacements.

This gasket suits BBC enthusiasts performing intake manifold installation, rebuild, or upgrade—especially those stepping up to high-performance heads like the BB-3 Extra 365cc series. Installation is straightforward: clean the cylinder head surface thoroughly with a gasket scraper or plastic brush, apply a thin bead of RTV around the water passages only, position the gasket, and torque the manifold bolts to specification in a cross pattern. Compatibility spans most big-block Chevy engines (427, 454, 496, 572 cid and similar displacements) equipped with compatible intake manifolds and BB-3 Extra cylinder heads. For optimal sealing integrity, always replace the gasket during manifold removal rather than reusing worn gaskets—the minimal cost difference protects against costly vacuum leaks and future teardown.