Exhaust Gasket SBC 23 Small Port (Pair)

The Exhaust Gasket SBC 23 Small Port (Pair) by BEYEA CUSTOM HEADERS is an essential sealing component for small-block Chevrolet engines running modern header systems. These gaskets prevent exhaust leaks at the critical junction between the cylinder head and header flange—a common failure point that allows unmetered air into the exhaust stream, causing performance loss and rough idle. Whether you're building a street engine, completing a restoration, or upgrading an existing header installation, a quality gasket pair ensures a tight seal that maintains back-pressure and fuel efficiency.

Designed specifically for the SBC 23 small-port configuration, these gaskets are engineered to withstand extreme exhaust temperatures and thermal cycling without degradation. The "23 small port" designation indicates compatibility with small-port cylinder heads commonly found on classic and performance SBC builds; the gasket profile precisely matches the bolt hole spacing and port openings of this head family. BEYEA CUSTOM HEADERS manufactures these with materials selected for durability and repeatable sealing, preventing the blowby that leads to vacuum leaks and drivability issues. The lightweight pair (0.16 lbs total) facilitates easy installation without adding parasitic weight to the exhaust system.

Mechanics and engine builders rely on these gaskets whenever installing or servicing BEYEA headers on small-block Chevrolet platforms—particularly those with small-port heads such as vintage 327, 350, or 383 configurations. Always replace gaskets during header installation or removal to avoid compression leaks that compromise tuning efforts and cost-down troubleshooting time. Installation is straightforward: position the pair against the head ports, align bolt holes, and torque fasteners in a star pattern to ensure even clamping pressure and a consistent seal across both gasket surfaces.