Seller notes

Manufactured by Spectre, part number 420. Spectre Header Gaskets are designed using high quality materials and engineered for optimum fit and function. Made from compressed ceramic fiber (CCF) that outperforms typical non-asbestos gaskets, CCF will not deteriorate from excessive heat or pressure. Designed for Big Block Chevrolet 396-454 engines with 1.70 inch round ports. These extra thick 1/8 inch gaskets will help stop header leaks and can even conform to warped header flanges and manifolds. A...

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