Cometic 4.200 MLS Head Gasket .040 - Oldsmobile 20-OTL-NB-3XL Single bearing design birdcages have

Single bearing design birdcages have replaceable components and are fitted with grade 8 hardware

One-piece versions mount using the lower front mounting holes

1984-1985 GMC G3500

Established in 1981

Cometic 4.200 MLS Head Gasket .040 - Oldsmobile 20-OTL-NB-3XL Single bearing design birdcages haveComprised 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