Cometic Gasket

C5712040

Cometic Gasket C5712-040 MLS .040 Thickness 4.300 Head Gasket for Pontiac 400-455

Header Gaskets

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For Pontiac 316ci, 350ci, 400ci, 421ci, 428ci, 455ci V8 Engines. Cometic Multi Layer Steel. The Cometic MLS gasket is compromised of three layers of Stainless Steel. Cometic uses Stainless steel for increased strength, its ability to rebound and corrosion resistance. The outer layers of the gasket are embossed and coated on both sides with a flouroelastometer rubber based material (viton) designed to meet the demands of a variety of harsh sealing environments, load conditions and surface finishes. The Viton coating is heat resistant to 250 C or 482 F. The center or shim layer of the gasket is compromised of an uncoated stainless steel layer, which can be varied to accommodate multiple thickness requirements. The MLS gasket is ideal for both aluminum heads to cast iron blocks and aluminum head to aluminum blocks. The composition of MLS will also withstand the shearing forces created by aluminum heads on cast iron blocks. No re-torque is necessary. By design the MLS gasket promotes an even torque load across the sealing surface allowing for measurable reduced bore distortion.

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