I will call the local BMW dealership and see what they can tell me. Chances are they not gonna mess around a whole lot with someone lowering a Bimmer. I'll see what come of it. i hope this isn't going to cost an arm and a leg. The rear tires are already weaing on the inside bad with the stock springs. My wife take a rough rode to work and I think it's progressively throwing things out of whack so regardless of price of spring install $, I need an alignment.
I'll keep in touch......
Cheers