SBF Gasket

The Schoenfeld SBF Gasket (Part No. 03520) is a premium exhaust header gasket engineered for Small Block Ford engines requiring a 1.510 x 1.500 inch square port opening. Built with a steel core graphite construction, this gasket combines durability with thermal stability, making it the ideal choice for builders and enthusiasts who demand reliable high-temperature sealing in performance and street applications.

The steel core graphite design offers superior gasket retention and sealing integrity across repeated heat cycles—critical for exhaust systems that regularly experience temperature swings from ambient to 1,200°F and higher. The 1.510 x 1.500 inch port dimension is the standard specification for square-port Small Block Ford heads, ensuring precise alignment with OEM and aftermarket manifold flanges. This gasket prevents exhaust leakage that can reduce scavenging efficiency and create unwanted noise and heat in the engine compartment.

Small Block Ford engine builders—whether for stock restoration, street performance, or track duty—rely on quality header gaskets to maintain seal integrity under load. The SBF gasket is rated for both naturally aspirated and moderately boosted applications, making it versatile across a wide range of SBF configurations. Installation is straightforward; the gasket installs between the cylinder head and manifold flange without requiring special tools or alignment fixtures.

Schoenfeld is recognized within the engine-building community for manufacturing gaskets to tight tolerances and material specifications, ensuring fitment accuracy and repeatable sealing performance across production runs. This gasket is sold individually, allowing builders to purchase exactly what they need for single or multi-carb header applications.