Cometic 4.100" Bore Head Gasket 0.045" Thickness Multi-Layered Steel SB Chevy R010015YM Machined aluminum cap twists into

Machined aluminum cap twists into the filler neck and seals with an O-ring

1/8" thick with an overall length of 20" wide but it can easily be cut down to 14"

Side A is AN-06

3-1/2 in ID

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Cometic 4.100" Bore Head Gasket 0.045" Thickness Multi-Layered Steel SB Chevy R010015YM Machined aluminum cap twists intoComprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0. 045". Round Bore. 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 created