Motor Trend Senior Features Editor Jason Cammisa explores the virtues of the BMW M4 GTS. The M4 GTS is BMW's solution for those who think the M4 is too soft, too sober, and too understated. Just 700 of these special cars will be produced, and only 300 of them are coming to the U.S. It costs a breathtaking $135,195, but delivers 68 more horsepower than the M4, for a total of 493 hp.