Please post here if you want to put an RPI exhaust on your X6!!!!!!
They currently don't make a system for the X6 but Eloy at RPI says they would if there is enough demand. My self and a few others on this board have seen the quality of the RPI system on our E60 M5's and now we want the same for the X6.
http://www.raceprecision.com/2009/
Consider me on the waiting list!
Dustin