E28 M5 rear Bilstein: use the Euro M5 Bilstein or Bilstein HD/B8 equivalents
The Euro M5 used Bilstein rear shock 33521129241 up to 2/86 (later BOGE 33522225898 with different springs and pads). Owners say Bilstein HD and Sport are valved almost the same for the E28, and one owner traced Bilstein B46-0727 as the M535i M-Technic rear. Match the spring to the shock era.
Parts / numbers mentioned: 33521129241, 33522225898, Bilstein B46-0727, HD/B6, Sport/B8
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