Timing covergasket for Bmw 3 Series: Bmw 3 Series E21: - 320-6 6cyl 122hp from 08/1977 to 12/1982 (engine code M20B20) - 323i 6cyl 143hp from 07/1977 to 10/1982 (engine code M20B23) Warning! Not suitable for 320-4 4-cylinder engine code m10. Timing belt cover not included.