Mr Gasket Ultra Seal intake gaskets are silicone beaded gaskets are perfect for aluminum heads & manifolds. A blend of nitrile rubber and fiber make a base that won't crack or split. They resist wicking and withstand 600 deg heat. The bead is around each port

Mr. Gasket Ultra-Seal intake gaskets

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
Can be trimmed if necessary for modified ports
Complete with manifold end rail seals and distributor gasket For OE replacement,

ENGINE					Port
CID	CYL.	YEARS	DESCRIPTION	APPLICATION	DIMENSIONS	ULTRA SEAL
396, 402 Gen IV	8	1965-72	1/16" Thick	Oval Port	1.75W x 2.16H	5827
396, 402 Hi-Perf Gen IV	8	1965-72	1/8" Thick	Rec. Port	1.75W x 2.16H
427, 454 Gen IV	8	1965-90	1/16" Thick	Oval Port	1.75W x 2.50H	5828
427, 454 Hi-Perf Gen IV	8	1965-90	1/8" Thick	Rec. Port	1.75W x 2.50H	5818
454-502 Gen V, VI	8	1991-00	1/16" Thick	Oval Port	1.85W x 2.16H

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Mr Gasket

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