This plug was used on 68-76 cars with automatic transmission. It is used to plug the hole in the firewall for the manual clutch pedal push rod. Size: N/A Corvette Central #: 533209 Original GM #: 3926349 Car years: 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976.
