Never been a fan of coilovers , heard they are OK for track use but far too harsh for the road, I am a fan of Bilstein damper/Eibach spring B12 kits. Put in your model details and search here https://www.bilsteinsuspensionstore.co.uk/info-parts_list?make=BMW&car_year=2004&model=3+Series&car_id=320+2.0+E46+d%7C2001%7C2005
Are bilstein still have manufacturing problems? In the Panda world the B6 is the damper to have and there have been supply issues world probably covid related.
@lynx started
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Never been a fan of coilovers , heard they are OK for track use but far too harsh for the road, I am a fan of Bilstein damper/Eibach spring B12 kits.
Put in your model details and search here
https://www.bilsteinsuspensionstore.co.uk/info-parts_list?make=BMW&car_year=2004&model=3+Series&car_id=320+2.0+E46+d%7C2001%7C2005