Just released from RSD (RennSportDesign), hubcentric wheel spacers for all your aggressive needs! These spacers are top notch in quality - constructed of Aerospace aluminum - these spacers will give you that wider and more stable stance. Your car will look more aggressive and lateral stability will be improved and optimized.
Details:
Available in 5mm, 12mm, 15mm and 20mm.
All RSD Hub-centric Spacers are Anodized and include appropriate shank bolts.
http://www.bavarianx.com/BMW_Wheel_Spacers_s/44.htm