Mr. Gasket 5813 Ultra Seal Extra Thick Chevrolet small block intake manifold gaskets for 1955-1991 engines with ported cylinder heads. Port dimensions are 1.31" wide by 2.31" high. Gasket thickness is 1/8". 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 end rail seals and distributor gasket included.
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