Mr. Gasket 5913 Ultra-Seal Header Gaskets

Asa Performance Verified independent store

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Fits 1965-1990 Chevrolet 396-454 Mark IV Big Block. Square Ports, 2.09 Inch Manufactured from high-temperature steel core/graphite faced exhaust material Expanded steel core provid es stability and maximum torque retention to eliminate gasket failure Graphite impregnated facing provides excellent heat resistance and thermal conductivity to transfer heat away from the cylinder head Conforms to and seals minor surface irregularities Show more