4.200 MLS Head Gasket .040 - SBC Brodix

The 4.200 MLS Head Gasket .040 for SBC Brodix from COMETIC GASKETS is the precision sealing solution serious engine builders and performance mechanics demand when assembling high-compression small-block Chevrolet platforms. Multi-layer steel (MLS) gaskets represent the modern standard for both stock rebuilds and modified engines, offering superior durability and reusability compared to traditional composite gaskets. Whether you're refreshing a tired 350 or building a dedicated race engine, this gasket sits at the critical interface between your cylinder head and block, making gasket selection as important as cam timing or compression ratio.

COMETIC's MLS construction uses alternating layers of spring steel and elastomer material to create a conformable, pressure-relieving seal that actually improves with cylinder pressure cycles—ideal for turbocharged, supercharged, or high-compression naturally aspirated builds. The .040-inch thickness is a proven specification for Brodix aluminum heads on SBC platforms, ensuring proper head deck clearance while maintaining critical combustion chamber volume that affects final compression ratio. This gasket can handle sustained boost pressures and repeated thermal cycling far better than traditional cork or composite alternatives, making it the choice for engine masters who refuse to warranty work or gamble on blown head gaskets mid-season.

Brodix head owners upgrading from stock or refreshing a build appreciate this gasket's precise fit and long-term reliability on both street and competition engines. Installation requires a clean deck surface and proper torque procedures—use a calibrated wrench and follow your engine builder's specifications (typically 65–75 ft-lbs for SBC applications with ARP fasteners). This gasket works with stock, aftermarket, and racing small-block Chevrolet blocks paired with Brodix or comparable aluminum cylinder heads; verify bore diameter and deck height match your specific application before ordering.