Gasket SBC Crate Motor

The Gasket SBC Crate Motor exhaust header gasket by Schoenfeld is engineered for small-block Chevy engines running high-performance builds, race applications, or street machines where reliability matters. This 1.50 x 1.50 inch D-port gasket seals the critical junction between your cylinder head and exhaust manifold, preventing hot exhaust gases from escaping into the engine bay and maintaining back-pressure integrity. Whether you're rebuilding a crate motor, upgrading vintage iron, or installing a modern stroker package, a quality header gasket is non-negotiable for longevity and consistent combustion sealing.

Constructed with a steel core material, this gasket delivers the thermal stability and compression strength required in high-heat exhaust environments where standard gaskets fail prematurely. The steel core construction resists blow-out under cylinder pressure spikes, maintains its sealing face across repeated thermal cycling, and withstands the aggressive conditions of forced-induction or nitrous oxide applications. The D-port design matches OEM small-block Chevy exhaust manifold and header flange configurations, ensuring precise alignment and zero-gap sealing without custom fitting or port matching.

This gasket suits any small-block Chevy platform—from 283 to 400 cubic inches—installed in street rods, muscle cars, race vehicles, or engine swaps. Mechanics and enthusiasts rely on Schoenfeld gaskets when building from a bare block or refreshing an existing power plant; one gasket is included per order, so plan your quantities based on your manifold configuration. Proper installation requires clean, dry surfaces and uniform bolt torque to specification; avoid re-use of worn header bolts, as they often stretch and cannot clamp adequately on a fresh gasket.