Porsche Launches A New 911 Race Car

Porsche Launches A New 911 Race Car The $375,500 Porsche 911 GT4 R has a flat-six engine producing 512 horsepower. It begins racing next year.The $375,500 Porsche 911 GT4 R has a flat-six engine producing 512 horsepower. It begins racing next year.  The $375,500 Porsche 911 GT4 R has a flat-six engine producing 512 horsepower. It begins racing next year.