Before the mad scientists at Porsche debut the next generation 911, they've been busy writing the last chapter of the 997, The 911 GT3 RS 4.0. Based on the GT3 RSR track car, the RS 4.0 will boast a four liter engine that will be capable of producing 500 horsepower which will help launch the car from 0-62 in just 3.9 seconds. Not impressed yet? Porsche took the to the legendary Nürburgring and put down an impressive track time of 7:27. Definitely not a bad way to close the books on the 997, going out in a blaze of asphalt crushing, petrol swallowing glory.