TSZ for 628 CSI up to 04/1981 and for 630 CS all years of manufacturing and for 633 CSI from 08/1978 up to 09/1979 and for 633 CSI up to 09/1980 only for country version AUS, S and for 635 CSI up to 09/1980, without cat, you need 1 for 1 car

BMW 628 CSI - M635 CSI (E24)