SBM MLS Head Gasket 4.040 Bore .080

The SBM MLS Head Gasket 4.040 Bore .080 from Cometic Gaskets is designed for serious engine builders and mechanics who require reliability in high-performance applications. This multi-layer steel (MLS) head gasket effectively seals the critical interface between the cylinder head and engine block, preventing combustion gas and coolant leakage under extreme conditions.

Constructed with layered steel and elastomer facing, this gasket distributes clamping pressure uniformly across the combustion chamber and coolant passages. This design resists blow-through and deformation, outperforming traditional cork or composite gaskets. The 4.040-inch bore specification is tailored for small-block applications, while the .080-inch thickness allows for compression adjustments.

Engine builders working on Chevy small-block, Ford Windsor, or similar platforms will find this gasket ideal for tuning static compression ratios. It is particularly beneficial for those looking to optimize performance in boosted or naturally aspirated builds. This precision component ensures that investments in machine work and porting are protected at the most critical seal point.