Comprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0.051". Cometic MLS (Multi-Layer Steel) Head Gaskets...

Cometic GM LS1 SB 3.840in Bore .040in MLS Head Gasket

Cometic GM LS1 SB 4.035in Bore .040in MLS Head Gasket

GM LS1/LS2/LS3/LS6 Gen-3/4 Small Block V8 .056" MLS Cylinder Head Gasket, 4.100" Bore.