My neighbor has an grey 06 325xi sport with a stick, and style 189s during the summer. It looks great and it as low as my 330i and he claims it has the stock springs, which don't doubt because he is the kind of guy that would not modify a car beyond wheels and tires. There is another 06 e91 325xi sport with a stick (white one) that has the same low stance and the owner bought it new and hasn't modified it so maybe it was a rare thing in early e9x production.
330i ~ BMW Perf. Susp. ~ M3 Front susp ~ BMW Perf Exhaust ~ 3.38 lsd ~ SF71 Alf CSL reps ~ Pilot Super Sports ~ AA Tune ~ 335is front brakes ~ EBC Yellows ~ 160,000 miles hardly broken in! WTB: e93 M3 Front Sway Bar