Alum SBC Exhaust Gasket Round Port

The Alum SBC Exhaust Gasket Round Port from Mr. Gasket is a precision-engineered header and manifold gasket designed for small block Chevy engines. This product serves as a critical sealing component between the engine block and exhaust manifold, preventing exhaust gas leaks that compromise performance and fuel efficiency. Whether you're building a street engine, race platform, or restoring a classic muscle car, a quality exhaust gasket is non-negotiable for reliable operation and emissions compliance.

Constructed from multi-layered aluminum, this gasket pair features 1.630-inch round ports optimized for small block Chevy manifold bolt patterns. The aluminum core provides superior heat dissipation and resistance to thermal cycling, which is essential in high-performance applications where manifold temperatures regularly exceed 1200°F. The multi-layer design creates a robust seal that withstands vibration, expansion, and contraction cycles without degradation, eliminating the need for frequent re-torque procedures that plague inferior gaskets. Mr. Gasket's manufacturing standards ensure consistent port alignment and crush characteristics across the sealing surface.

This gasket pair is ideal for enthusiasts and professional builders working on 262–400 cubic inch small block Chevy engines with round-port manifolds. Installation is straightforward: clean the mating surfaces thoroughly, position the gaskets on the cylinder head ports, install the manifold, and torque fasteners to specification in a cross pattern. Proper surface preparation and torque sequence are critical—inadequate prep work or uneven fastener tension will result in exhaust leaks. Compatible with both cast iron and aluminum manifolds, the Alum SBC Exhaust Gasket Round Port provides a durable, long-service solution for both street and competition engines.