Front Disc Brake Caliper Piston 47.90 30.05Porsche 911 1964 to1985 Porsch 912 1965 to 1985All Years 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985