Source:Speedhunters This week Porsche released info on the latest version of the 911 GT3 RSR. Although it's still based on the previous 997 chassis as opposed to the new 2012 911, the RSR is sporting some significant changes for 2012. Customers around the world will make good use of the RSR's 460 horsepower in various international racing series around the world. The overall width of the RSR has been increased by 48mm, adding to what was already an aggressive stance.