Cometic 4.100 MLS Head Gasket .040 - SB Chevy LT1 SR91152PUO-6 23 and numerically higher ratio

23 and numerically higher ratio gear sets with standard thickness ring gears into 3

Valve seats and phosphorous bronze guides are installed

1975-1987 Chevrolet G20

All Wrap Around

with laser-cut CNC-formed 3/16-inch steel plate

Cometic 4.100 MLS Head Gasket .040 - SB Chevy LT1 SR91152PUO-6 23 and numerically higher ratioComprised 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