The 2016 BMW M4 GTS is a street-legal racecar. With 493 horsepower and extensive carbon fiber in the chassis & body, BMW is proudly calling it the “most agile, radical, & powerful M4 ever.” Used for the first time in a production road car, this M4 features a water-injection system that cools the intake, helping the turbochargers to crank even harder. Only 300 of these track-tuned cars will be imported to the U.S.