The future generation 2013 Porsche 911 GT3 was recently spied wearing absolutely no camouflage. Not only do we get a clear view of its exterior design, but we also get to hear the engine and exhaust of the new 911 GT3 (2013). Although it is not confirmed yet, various sources are saying that the 2013 Porsche 911 GT3 is going to be powered by a 3.8-liter engine, with an output of 470 hp. It will be sold exclusively with the PDK double-clutch transmission.