That would be fantastic if you can pull it off - not sure how the xDrive would deal with it though, not to mention all of the reprogramming, install complexity, ... I would give Nate or Ilia from IND a call. If there is somebody in Chi that can do it they will know.
Please keep us posted...
08 E90 | Jet Black / Black | 6MT
Mods: RAC RG63 w/ Pirelli Corsa 255F/285R | Akrapovic Evo Exhaust | OEM Blacklines
Winter Setup: OEM 18s w/ Nokian Hakkapeliita R 245/40-18