[QUOTE=Thumperx;10892401]Under Suspension section, you'll find Mr.5's listing of springs types and rates:
http://www.e90post.com/forums/showthread.php?t=235797
Those rates aren't published by BMW just estimated by an enthusiast. I haven't seen anyone actually measure the spring rates of the BMW PS for the 335i and that's why I asked the question..
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2007 E90 335i, TiAg, 6AT, ZPP, ZSP, ZCW, 6FL, HD
Quaife lsd, ETS fmic, GIAC s/w, Dinan intake/exhaust/oc, Koni/M3 susp, Apex Arc 8, Mich PSS