Compatible with 396-502 Chevrolet Big Block Mark IV 1965-90 Square Ports;

Hooker's precision-matched Super Competition header gaskets provide a sure fit and unmatched exhaust sealing. This OEM quality gasket is constructed of a thick (.060 in.) high temperature, synthetic hi-temperature gasket material with a perforated steel core, which provides a superior grip and adhesion. This construction also contributes to exact fit compliance between the cylinder head and header flange, offering excellent sealing properties during extreme temperature and operating conditions.;