I bought my 85 635 Euro about a year ago. I've replaced exhaust system (Stebro downpipes to tip (no cat)),bushings, bearings, shocks (BOGE gas turbo), tires (225/60/15 Brigestone EAGER'S), BMP stress bars, and now the most improvement (750 bushings (Ultimate Garage) and 25/l9mm sway bars (Just BMW)). The car is so tight, it's night and day. I'am sure Bilstiens/H&R Springs may be slightly better, but I live within NYC borders and must deal with these roads and their pot holes. Recently a 330 could not stay with me through a nice turn at 100 mph. The car is just a pleasure to drive. You Know What I Mean.