Car Pron: GT3 RS 4.0 vs M3 GTS vs C63 AMG Black (Drive)

Our favorite automotive reporter, Chris Harris, plays with three German sporting heavy weights; the outgoing Porsche 911 GT3 RS 4.0, Mercedes-Benz C63 AMG Black Series and the BMW M3 GTS. Enjoy, because I know you will.

Video courtesy of Drive.