Mr. Gasket 5821 Ultra Seal Chevrolet small block intake manifold gaskets for 1955-1991 ported cylinder heads. Gasket port dimensions are 1.25" wide by 2.13" high by 1/16" thick. Manufactured from cellulose/nitrile composition gasket material. Provides excellent sealing and durability. Silicone beading applied around each port to create a tight leak-proof seal. Complete intake manifold gasket set with manifold end rail seals and distributor gasket.
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