Weighingin at over 5,000 pounds, both new Ms promise to sprint from 0-60 mph in 4seconds flat. Despite the increase in power and performance, BMW says thetwo models benefit from a 20 percent reduction in emissions and fuelconsumption on the European cycle. From a styling point of view, the X5 M andX6 M receive a host of aesthetic benefits to differentiate them from theirnon-M brothers. These include 21-inch wheels, quad exhausts, side gills, largeair intakes, flared wheel arches and more. Inside, the M's are given a newsteering wheel with aluminum paddle shifters, new sports seats and more Mequipment throughout.