SBC Exhaust Gasket 18 Degree & ASCS Head

The SCHOENFELD SBC Exhaust Gasket 18 Degree & ASCS Head (MPN 01530) is a precision-engineered sealing component designed for small block Chevy performance builds and racing applications. This gasket prevents exhaust leaks at the critical junction between your header flange and cylinder head—a common pressure point in high-RPM engines where standard gaskets fail. Whether you're assembling a street engine, bracket racer, or weekend warrior, a quality header gasket is non-negotiable for maintaining peak exhaust scavenging and preventing costly coolant or combustion gas intrusion into the gasket material.

Built with a steel core and graphite facing, this gasket delivers superior thermal stability and compression set resistance under sustained heat and vibration. The 1.750 x 1.520 inch D-port design matches the bolt pattern and port geometry of small block Chevy applications, while the 18-degree angle specification ensures perfect alignment with ASCS-style cylinder head castings and modern aftermarket heads. The steel core prevents gas blow-by and blowout, while graphite facings conform to port irregularities without requiring excessive clamp load that can warp aluminum heads or crack cast iron. This combination of materials and engineering is industry-standard for engines running above 6,000 RPM or producing sustained boost pressure.

Mechanics and engine builders trust SCHOENFELD gaskets for rebuild jobs, engine swaps, and competitive racing where reliability cannot be compromised. Installation is straightforward—gaskets are sold individually, so order one per cylinder head. This gasket is compatible with small block Chevy platforms (262, 283, 305, 327, 350, 400 cubic inch variants) paired with ASCS or similar performance heads. Always inspect header flanges for flatness and port damage before installation; even minor warping will compromise the seal and negate gasket quality. Use a light coat of anti-seize on studs to prevent galling and ensure proper torque sequence on your exhaust manifold or header bolts.