This is the new 911 GT2 RS, successor to the 997-based GT2. All you really need to know is this: 620 horsepower from 3.6 twin-turbocharged liters, a 'Ring time of 7:18, and "improved fuel economy" (by 5%). For less important information, read on.
It's lost 154 lbs or 70kg, gained 90 horsepower, and it doesn't like you. This fiend comes with a standard 6-Speed manual gearbox, Porsche's fancy ceramic brakes, "unique anti-roll bars", new tires measuring 245/35 ZR 19 at the front and 325/30 ZR 19 at the rear that were specifically developed for this car,and a whole lot of other fancy suspension doo-dads.