4.200 MLS Head Gasket .040 - SBF SVO

The 4.200 MLS Head Gasket .040 - SBF SVO from Cometic Gaskets is engineered for serious Small Block Ford engine builders and performance enthusiasts who demand reliability under high compression and boost conditions. This multi-layer steel (MLS) gasket is purpose-built for SBF SVO applications, delivering the seal integrity required when running aggressive cam profiles, forced induction, or high-RPM combinations. Whether you're rebuilding a stock 302 or pushing a modified 347 stroker, this gasket ensures your head gasket surface doesn't become a liability on the dyno or track.

Cometic's MLS construction uses multiple layers of spring-tempered steel to maintain consistent clamp load across the combustion chamber, cylinder walls, and coolant passages—critical for preventing blow-by and coolant weeping. The .040-inch thickness specification provides optimal compression ratio while maintaining adequate material density for reusability if an engine is freshened later. The gasket's design accounts for the SVO's unique bore spacing and combustion chamber geometry, ensuring perfect alignment with your cylinder head and block deck surface without hot spots or localized stress concentration. This precision fit minimizes the risk of head lift during peak cylinder pressures, a common failure point in stock gaskets under forced induction or nitrous oxide applications.

Builders working with 4.200-inch bore SBF engines—including turbocharged, supercharged, and high-compression naturally aspirated builds—rely on this gasket's proven performance in competition and street applications. Installation requires proper head bolt torque sequence and specification adherence to Cometic's recommended values; undersized fasteners or improper torque patterns will compromise gasket performance regardless of quality. The gasket's compatibility with both original SVO heads and modern aluminum racing cylinder heads makes it a versatile choice for vintage restoration projects and contemporary engine modifications alike. Always verify your specific engine block and head combination before ordering to ensure correct bore diameter and thickness specifications for your application.