Coming to the meaty part of the 911 model line revamp, the 2010 GT3 RS has been spotted after some time in wardrobe wearing slightly different clothes. These are subtle alterations, with LED daytime running lights, bigger intakes, a new air dam lip up front and revised taillights out back. The bigger news is that the GT3 RS will get more power with the addition of direct injection, and even faster gear changes when equipped with the PDK gearbox. And that means even faster acceleration, because you can never get enough of that. The car should start making its rounds around the auto show circuit next year.

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

var so = new FlashObject ("http://natalie.feedroom.com/gm/natoneclip/Player.swf", "Player", "450", "240", "8", "#000000");so.addVariable("skin", "natoneclip");so.addVariable("site", "gm");so.addVariable("fr_story", "de82f59acf15bc7a9a45f0632a8b0bb7ce5a2457");so.addVariable("hostURL","document.location.href");so.addParam("menu", "false");so.addParam("quality","high");so.addParam("allowFullScreen","true");so.addParam("allowScriptAccess","always");so.write("flashcontent");

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.

When Porsche introduces a new 911 update, you know exactly what that means: derivatives. The Porsche 911 has more derivatives, body-styles and variants than just about any other automobile in production, and after unveiling the latest 911 Carrera and Carrera S, Carerra 4 and Carrera 4S, in both coupe and cabrio formats, the next version due for release is the 911 Targa.

Click above for a high-res gallery of the 2009 Porsche 911 C4 and C4S

Porsche, like every other automaker under the sun, is under pressure to produce vehicles with improved fuel efficiency that emits less CO2. The current 911 puts out 225 g/km of CO2, but Porsche believes that it can hack another 10 g/km off that figure with the implementation of start-stop technology on its flat-six engines. Not so fast, say Porschephiles. According to the automaker, buyers aren't fond of such a feature on their arse-engined performance machines. Porsche didn't cite the reasons behind consumer's reluctance, but a 10 g/km reduction doesn't seem like much in the overall product scheme of Porsche.

Click above for a high-res gallery of the 2009 Porsche 997 Carreras