The Porsche 911 GT2 is the street legal sports version based on the 911 Turbo. It is stronger and lighter than the 911 Turbo and it also has a rear-wheel-drive opposite to the Turbo's all-wheel-drive. In 2010 Porsche introduced an RS-version of the 997 GT2 that was limited to 500 items. It is the most track-focused 911 out there and it renounces anything that makes it heavier. The windows are even made from plastic and there is only a small slot that can be opened manually.