I was able to get these installed yesterday. I have had FSD's on a few cars now and really like the ride. The car rides better with FSD's than it did with my OEM "S" dampers. The only deviation was cutting the front bump stop by 1/3.

 

I may be wrong but I remember reading that Koni does not recommend the use of FSDs with lowering springs. This is just for Minis.

 

Officially they will not say it's ok. You do run the risk of bottoming the dampers however the FSD's are slightly shorter. For BMW's, and others I am guessing, there is a kit which includes springs as well. The FSD's in those kits do have a different part number than the ones w/o springs.