Cometic 4.320 MLS Head Gasket .040 - BB Chevy Gen V & VI MAC-1X 7'' of usable stroke

7'' of usable stroke

drop-in mounting orientation with user-adjustable geometry

Steel socket for rotating the crankshaft during engine assembly features a 1" hex and a 1/2" ratchet drive

Lower portion of net secures around a lower bar

Cometic 4.320 MLS Head Gasket .040 - BB Chevy Gen V & VI MAC-1X 7'' of usable strokeComprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0. 040". 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 by the two