Comprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0.052" GM Gen III/IV Small Block V8 LS Series MLX...

Cometic GM LSX 4.150in Bore .051in MLX 5-Layer Head Gasket

Cometic GM LS1 SB 105.41mm Bore .073 in MLX 5-Layer Head Gasket

GM LS1/LS2/LS3/LS6 Gen-3/4 Small Block V8 .040" MLX Cylinder Head Gasket, 4.040" Bore.