With an all-new Porsche 911 on deck for the 2012 model year, the 2012 Porsche 911 GT3 Cup factory racer is very likely the last of the current model's progeny, and it's a good one. Powered by an engine that's "largely identical" to the production 911 GT3 RS unit, meaning a 3.8-liter naturally-aspirated flat six, it generates six more horses for 450 horsepower and redlines at 8,500 rpm.