It's been a while since we last brought any details on the upcoming Porsche 911 Turbo and 911 GT3, so here's a very cool video of the two models in action on the Nurburgring, courtesy of BridgeToGantry.com.

The two models caught testing came equipped with the PDK semi-automatic transmission and seem to have received some final touches, making an official debut closer than we think. Both models will go on sale by the end of 2012.

The future Porsche 911 GT3 will be powered by a 4.0 liter engine that will deliver a total of 480 HP, while the Porsche 911 Turbo will get a 3.8-liter flat-six engine pumping out about 550 HP. Next to the seven-speed PDK, the two models will also receive a standard six-speed manual gearbox as standard.

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