Hope it's not a repost...
Source:
http://www.autoblog.com/2008/08/26/s...n-spartanburg/
more pics:
http://www.autoblog.com/photos/bmw-x...-shots/999584/
The prototype X5 and X6 M have enlarged air intakes with white LED headlamps up front and aerodynamic rear bumpers with quad pipes poking out the back
the exhaust notes are a reported dead giveaway: the X5 M prototype sounding like a twin-turbo V8, while the X6 M sounds more like a V10 or V12.
Source:
http://www.autoblog.com/2008/08/26/s...n-spartanburg/
more pics:
http://www.autoblog.com/photos/bmw-x...-shots/999584/
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