Mr. Gasket 5863 Ultra Seal Chevrolet big block valve cover gaskets.
Measures 5/16" thick.
Fits 396 and larger 1965-1990 Gen4 Chevrolet big block engines.
Packaged 2 per set.
Manufactured from high density cork/rubber blend gasket material. Creates a positive seal by controlled swelling of the gasket material when exposed to hot engine oil. a black latex rubber coating is applied to the outside of the gasket to help seal minor flange irregularities and eliminate the possiblity of oil leakage.
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