4.080 MLS Head Gasket .051 - SBM

The 4.080 MLS Head Gasket .051 - SBM from Cometic Gaskets is a precision cylinder head gasket engineered for small block Mopar engines requiring reliable, leak-free performance under demanding conditions. This multi-layer steel gasket is designed for builders and enthusiasts who demand OEM-quality sealing without compromise, whether for street applications, mild boost scenarios, or high-compression builds.

Constructed from advanced multi-layer steel (MLS) technology, the 4.080 MLS Head Gasket delivers superior conformability and reusability compared to traditional composite gaskets. The 0.051-inch compression thickness is precisely calculated to maintain correct combustion chamber volume and quench distance for optimal flame propagation and detonation resistance. The 4.080-inch bore diameter matches stock and performance small block Mopar cylinder specifications, ensuring perfect sealing between the block deck and cylinder head without interference or leakage paths.

Small block Mopar engines—including 318, 340, and 360 variants—benefit greatly from Cometic's precision engineering, particularly in rebuilt or performance-enhanced applications where factory gaskets may not provide adequate sealing integrity. Installation requires proper head bolt torque sequences and resurfaced mating surfaces for maximum effectiveness. This gasket is sold individually and is an essential component for any cylinder head assembly, rebuild, or refresh project on small block Mopar platforms.