A friend on mine installed a set of Bilstein Sport shocks/struts last weekend. I didn't want the extra stiffness of sport spings (changed my mind since), so I kept the stock springs. WHOA... I guess it's something about the higher pressure Bilstein shocks, but my M3 looks like a pick up truck now. I was reassured, however, that they will "sit down" after about 1,000 miles or so. I hope so!! Oh yeah, BTW, the Bilsteins feel great!