Cometic 4.125" MLS Head Gasket (Each) - .040" Thickness - SB Chevy 262-400 18/23 w/ Steam Holes R10002XL The proportioning valve may be

The proportioning valve may be adjusted to limit rear brake pressure to help prevent rear brake lock-up

1970-1971 Chevrolet G30 Van

12 in Wide

Bell / Zamp Helmets

Bolt-in Bracket (2 Each)

Cometic 4.125" MLS Head Gasket (Each) - .040" Thickness - SB Chevy 262-400 18/23 w/ Steam Holes R10002XL The proportioning valve may beComprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0. 040". With Steam Holes. 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