One of perennial first names in racing is Porsche, and that's because the German automaker is always looking to improve its motorsports products. Progression, thy name is 2012 Porsche 911 GT3 R. Drivers and teams upgrading to the latest 911 for the track will find a host of changes designed to make lap times lower and speeds higher.
- Most and least efficient car companies
- Fastest-depreciating cars in the United States
- Find and compare 2017 Models