Cometic 4.165" Bore Head Gasket 0.040" Thickness Multi-Layered Steel SB Chevy BR10072 They are coated with a

They are coated with a special sealer to promote sealing and give a great look

1977-1977 Buick Century

A500 (40RH/42RH/40RE/42RE/44RE) transmissions

100-micron stainless steel element

Cometic 4.165" Bore Head Gasket 0.040" Thickness Multi-Layered Steel SB Chevy BR10072 They are coated with aComprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0. 040". With Steam Holes. Cometic MLS (Multi Layer Steel) Head Gaskets provide maximum sealing performance for todays high output engines and require no sealants. MLS gaskets are ideal for both aluminum heads to aluminum blocks and aluminum heads to cast iron blocks. They can withstand the shearing force