Ultra Seal's 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. Fits 396402 Gen IV Big Block Chevy 1965-72 and 1965-90 427454 Gen IV engines. 1/16" Thick Oval Stock Port 1.85W x 2.16H.
- Improves Performance
- Precision die cut for each application. These gaskets can be reused.
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