Click above for high-res gallery of BMW X5 M and X6 M spy shots

Despite earlier assertions to the contrary, all indications are now that BMW is preparing its first batch of M-tuned sport-utilities, including an X5 M and X6 M. Advanced-stage test mules for both have now been spied by a keen photographer right here in the United States, at BMW's Performance Center test track in Spartanburg, South Carolina.

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 trademark M division side gills have been camouflaged, but 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. The appearance of the M-tuned crossovers on American soil instead of on the Nurburgring gives us an idea of just who BMW will be targeting with these performance sport-utes. Check out all the spy shots in our gallery below and hit up the source for two spy videos. Mad props to PalBay for the tip and the shots!

Related GalleryBMW X5 M and X6 M - spy shots

[Source: PalBay]