Does the M at the end of BMW X6 M stand for performance Monster?  The 555-HP pulse pounding M edition of the BMW X6 was recently taken out to the track to see if it has earned the coveted M designation.

Popular Mechanics had the chance recently to take the BMW X6 M out on the fabled Road Atlanta racetrack recently, and delivers all the details in the 2010 X6 M test drive report.  It includes all the juicy details that all BMW enthusiasts can’t wait to get their hands on.

The spec detail is impressive with sections on the elimination on turbo lag & snappy throttle response, extensive upgrades to the cooling system, and two levels of vehicle-speed-sensitive power assist steering.

Will the purists reject this $89,725 X6 M crossover?