4.410 MLS Head Gasket .027 - BBM

The 4.410 MLS Head Gasket .027 - BBM from Cometic Gaskets is a precision cylinder head gasket engineered for Mopar B and RB-series big-block engines. This gasket is built for mechanics and engine builders who demand reliability during high-performance builds, stock restorations, or turbocharged applications. Whether you're rebuilding a classic 440 Magnum or a 426 Hemi, a quality head gasket is the foundation of a leak-free, long-lasting engine assembly.

This multi-layer steel (MLS) design uses precision-etched stainless steel and elastomer layers to create a compressed seal that resists blow-by and coolant seepage under extreme cylinder pressures. The 4.410-inch bore diameter matches factory specifications for B/RB blocks, while the 0.027-inch compression thickness is calibrated to achieve optimal combustion chamber volume and compression ratio without requiring custom piston work. Cometic's micro-finish technology on sealing surfaces ensures consistent clamp load distribution across the head-to-block interface, critical for preventing gasket failure at high RPM or boost levels.

This gasket serves street machines, race cars, and restorations alike—any application where factory durability or aftermarket performance demands a superior seal. Installation requires proper head stud torque sequencing and surface preparation; use on freshly honed or decked blocks for maximum effectiveness. The MLS construction is reusable under controlled conditions, making it ideal for prototype tuning or repeat tear-downs during development work.