One new Mann brand air pump filter, part number C78. This fits: Porsche 911 Turbo Carrera 1986-1989, Porsche 911 1975-1983, Porsche 914 1974-1976, Porsche 912 1976, Porsche 930 1978-1979, Porsche 911 Turbo 3.6L 1993-1994
One new Knecht brand air pump filter (made in Germany), part number C78, 042-1356, 11-00791, 113.131.123, 930.113.401.00. This fits:
Porsche 911 Turbo Carrera 1986-1989
Porsche 911 1975-1983
Porsche 914 1974-1976
Porsche 912 1976
Porsche 930 1978-1979
Porsche 911 Turbo 3.6L 1993-1994