Cometic 4.320 MLS Head Gasket .040 - BB Chevy Gen V & VI MAC-1X drop-in mounting orientation with user-adjustable

drop-in mounting orientation with user-adjustable geometry

Superior dog clutch design provides the most durability and the smoothest shifting available

Panhard Bars

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

300 in Head

Cometic 4.320 MLS Head Gasket .040 - BB Chevy Gen V & VI MAC-1X drop-in mounting orientation with user-adjustableComprised 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