4.100 MLS Head Gasket .080 - SBC

The 4.100 MLS Head Gasket .080 - SBC from Cometic Gaskets is engineered for small-block Chevrolet engines requiring precision sealing at the cylinder head interface. This Multi-Layer Steel (MLS) gasket is purpose-built for high-performance and street applications where reliable combustion chamber sealing is critical to engine longevity and consistent performance. Whether you're rebuilding a classic 350, upgrading a 327, or refreshing a performance 400, this gasket delivers the dependable sealing your SBC demands during both daily driving and elevated boost conditions.

Cometic's Multi-Layer Steel construction uses a .080-inch compressed thickness to provide superior gasket crush and recovery compared to traditional graphite head gaskets. The 4.100-inch bore diameter is optimized for standard small-block Chevrolet cylinder head configurations, ensuring proper sealing ring coverage over each combustion chamber. MLS gaskets excel in modern engine builds with aluminum heads, ductile iron blocks, and tight tolerances because they resist deformation under thermal cycling and maintain clamp load integrity across repeated heat cycles. The steel layers provide better conformability to imperfect surface finishes while delivering improved blowby control and oil/coolant separation.

Mechanics and enthusiasts rebuilding small-block Chevrolet engines benefit most from MLS head gaskets when working with aftermarket aluminum cylinder heads, ported or resurfaced block decks, or high-compression builds where traditional gasket materials are prone to failure. Installation requires proper head bolt torque specifications and a clean, flat sealing surface—Cometic recommends using ARP bolts and following manufacturer torque sequences for optimal gasket performance. This gasket is compatible with all standard SBC head bolt patterns and works seamlessly in naturally aspirated, supercharged, and nitrous applications, making it an ideal choice for long-term reliability in competition and street engines alike.