gt2

click for a high-res gallery from the 2008 Detroit Sports Car Challenge

Click above for high-res gallery of the 2009 Porsche 911 Carrera S with PDK

Click above for a hi-res gallery of the GT Street RS

The Porsche 911 GT2 has 530 horsepower, 505 lb-ft of torque and is capable of going 204 mph. And it's not enough. Not for TechArt, at least. You know TechArt. They take Porsches that already push the limits of performance and go all Chuck Yeager on them, probing for new and more crazy limits. Generally they find them, then they package them up and offer them to the moneyed public. Case in point: the new GT Street RS. What begins as a "normal" GT2 turns into a 700-horsepower, 634 lb-ft (860 Nm) warp-enabled street predator when the TechArt people are through messing with it.

Click above for a high-res gallery of the Gemballa Avalanche 600 GT2 EVO.

Click above for a high-res gallery of the SpeedART BTR-XS 650.

The Porsche 997 GT2 is the undoubtedly the king of the 911s, but the crew at SpeedART has decided to add a few more jewels onto the GT2's crown. Beginning with the overly competent twin-turbocharged flat-six, the German tuning haus modified the stock snails, replaced the headers, fitted a new exhaust with freer flowing cats, installed larger intercoolers and tuned it all with a Motronic ECU. Output is now up to 650 hp and 634 lb.-ft. of torque, propelling the BTR-XS 650 to 60 in 3.2 seconds and on to a top speed of 216 mph.