Cometic 4.100" Bore Head Gasket 0.045" Thickness Multi-Layered Steel SB Chevy R010015YM 3-1/2 in ID

3-1/2 in ID

Side A is AN-06

Weld-in mild steel sleeve provides a mounting point for jack bolts or adjustable shock mounts

not for ECU calibration

Cometic 4.100" Bore Head Gasket 0.045" Thickness Multi-Layered Steel SB Chevy R010015YM 3-1/2 in IDComprised 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