Originally Posted by AWD Addict
You'll want Bilstein sports if you're going to lower the vehicle with H&R or Eibach or Swift Springs.
HDs are valved for stock height setups.
Hey AWD Addict
I am looking to go the same route - Eibach/Bilstein sport (or Eibach/Koni Yellow). What are your longer term thoughts? I commute into Boston every day, with an '09 335i xDrive. Don't want to drop too much (H&R seems much lower and stiffer) but have heard good things about Bilsteins from other friends (non BMW cars, though). Any input would be appreciated. Also, did you DIY, if not, where did you go?