4.180 MLS Head Gasket .040 - SBM

The Cometic Gaskets 4.180 MLS Head Gasket .040 for Small Block Mopar is a precision-engineered sealing solution designed for serious engine builders and mechanics tackling high-performance Small Block Mopar builds. This multi-layer steel (MLS) head gasket is engineered for engines where reliability and durability under sustained combustion pressure are non-negotiable.

Whether you're refreshing a classic Dodge or Chrysler performance engine or building a modern stroker package, this gasket delivers the consistent sealing integrity that separates a show-quality engine from one prone to coolant weeping and compression loss. The .040-inch thickness is optimized for standard Small Block Mopar deck heights, while the 4.180-inch bore diameter ensures proper combustion chamber sealing without material overhang that can cause local hot spots or gasket failure.

Cometic's precision manufacturing and strict quality control mean you get consistent thickness, repeatable bore geometry, and reliable embossment patterns that work with both stock and ported cylinder heads. This design excels in street, bracket racing, and restoration applications where you need confidence that your gasket won't fail mid-season. Small Block Mopar enthusiasts—from 318 cubic inch stroker builds to high-performance applications—will appreciate the reliability this gasket provides.