Gasket SB 18 Degree

The Schoenfeld 18 Degree Gasket SB (SKU SCH01540) is a precision exhaust header gasket engineered for Small Block Chevy applications. This steel core graphite gasket features 1.750 x 1.580 inch square ports and is designed to create a reliable seal between the exhaust manifold and cylinder head, preventing exhaust leakage and maintaining combustion chamber integrity under high heat and pressure cycling.

The 18-degree angle specification indicates the gasket is cut to match the corresponding port angle on your cylinder head, ensuring proper face-to-face contact with the manifold flange. Steel core construction provides structural rigidity and prevents blowout, while the graphite facing accommodates thermal expansion and resists corrosion from exhaust temperatures. This particular configuration is optimized for Small Block Chevy platforms, making it essential for any original or performance exhaust system requiring proper port alignment and sealing.

Small Block Chevy enthusiasts performing manifold installation, restoration, or performance upgrades rely on correctly matched gaskets to avoid exhaust leakage, which compromises performance and creates unwanted noise. The Schoenfeld gasket is sold as a single unit, allowing buyers to order the exact quantity needed for their application. Proper gasket selection—including port size and angle—is critical; this 18-degree gasket is designed for heads and manifolds machined to that specific angle.

Schoenfeld is recognized in the automotive and racing community for manufacturing quality manifold and header gaskets that perform across street and competition environments. Always verify your cylinder head and manifold angle specifications before purchasing to ensure compatibility.