Porsche Says Goodbye to the 997 Series with 500HP 911 GT3 RS 4.0 [with Video]

The new 911 GT3 RS 4.0 is Porsche's ultimate street-legal track racer and a fitting farewell to the current 911 series, codenamed 997, which will soon be replaced by an all-new model set to be unwrapped at this year’s Frankfurt Motor Show in September. There’s a lot to like about the new GT3 RS including the fact that it is fitted with the largest engine ever to be mounted on a factory-approved