The 2013 Porsche 911 GT3 is a model expected by every petrol head and now new details are available thanks to forum member Rennlist.  According to him the new 911 GT3 will be the most extreme and quickest GT3 of all time.
 
The tachometer will go all the way up to 10.000 rpm with the red light set at 9.000 rpm. This means that the new 911 GT3 will rev just as aggressively as the much more powerful Ferrari 458 Italia. Under the hood we will find the 3.8 liter flat-six engine that is expected to produce more than 450 hp. 

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The upcoming Porsche 911 GT3 will share the same wide body chassis as the Porsche Carrera 4, it will run on Dunlop Sport MAXX tires that are measuring 245/20 on front and 305/20 at the rear.

Source: Rennlist