This part is listed by BMW as BMW part number 23231202739 (23 23 1 202 739) and is described as Synchronizer Ring (synchro) as used in the Getrag 262 / 265 transmission, as used in US E24 6 series, Euro E30 M3, and more.
For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.
BMW Fitments:
3 Series
E30 (84-91) > M3
6 Series
E24 (77-89) > 630CSi
E24 (77-89) > 633CSi
E24 (77-89) > 635CSi