Cometic Chevrolet 348/409 W-Series Big Block V8 .040in MLS Cylinder Head Gasket - 4.375in Bore - C5256-040

Comprised 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 materials. MLS gaskets have increased strength because they are comprised of multiple layers of stainless steel; which also creates the ability to rebound and resist corrosion. The outer layers are embossed and coated on both sides with Viton (a flour elastomer rubber based material that is heat resistant to 250 C/ 482 F). Viton is designed to meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes. The center or shim layer is uncoated stainless steel, which can be varied to accommodate multiple thickness requirements.

This Part Fits:

Year	Make	Model	Submodel
1958-1965	Chevrolet	Bel Air	Base
1958-1965	Chevrolet	Biscayne	Base
1960	Chevrolet	Biscayne	Fleetmaster
1958-1961	Chevrolet	Brookwood	Base
1960-1965	Chevrolet	C10 Pickup	Base
1960-1965	Chevrolet	C20 Pickup	Base
1960-1965	Chevrolet	C30 Pickup	Base
1958	Chevrolet	Del Ray	Base
1959-1960	Chevrolet	El Camino	Base
1958-1965	Chevrolet	Impala	Base
1964-1965	Chevrolet	Impala	SS
1960-1965	Chevrolet	K10 Pickup	Base
1960-1965	Chevrolet	K20 Pickup	Base
1959-1961	Chevrolet	Kingswood	Base
1958-1961	Chevrolet	Nomad	Base
1960-1965	Chevrolet	P20 Series	Base
1960-1965	Chevrolet	P30 Series	Base
1959-1961	Chevrolet	Parkwood	Base
1958	Chevrolet	Sedan Delivery	Base
1960-1965	Chevrolet	Suburban	Base
1958,1960	Chevrolet	Truck	Base
1958	Chevrolet	Yeoman	Base