The 997 GT3 model also debuted in Geneva in 2006. Like previous GT3 models, it is a way for Porsche to homologate aerodynamic features for racing, as well as a starting model for customer racing. The 997 GT3 was priced at US$106,000. The engine has the same displacement as the Turbo, but without turbocharger and uses a new variable intake system. The engine is rated at 435 PS (320 kW; 429 hp) and 405 N·m (299 lb·ft)[5]. It has an 8400 rpm redline which is the same as the 612 bhp (456 kW; 620 PS) Carrera GT's. The 3.6L dry-sump engine does not seem to share the rear main seal (RMS) problems of the earliest 3.6L/3.8L semi-dry-sump engines.
The GT3 body includes a special front bumper which increases cooling for the front-mounted radiators as well as a split spoiler at the rear. The GT3 also includes a special rear bumper and center tailpipes which draw heat away from the engine. It is lowered and rides on 30-series 305mm (12 in) tires on 19in (483mm) wheels. The car weighs 3075 lb (1395 kg).
The 997 GT3 is more driver-friendly than its predecessor, with "comfort" seats and the Porsche Communication Management system installed.
The special RS model came without most of these luxuries out to focus more on track-oriented driving (although the car is still road-legal). The package also included a full rollcage and carbon fiber seats to add to that race-car-for-the-road feel. The RS version was released in Europe in October 2006; the North American release was in March 2007. A racing version of the GT3 RS debuted in 2007, and it was called the 997 GT3 RSR.
The ratios on the six-speed transmission are more aggressive, allowing the GT3 to hit 60 mph (97 km/h) in 4.1 seconds, while the RS accomplishes the same in 4 flat. It will continue to 100 mph (160 km/h) in 9.2 seconds and has an ungoverned top speed of 310 km/h (190 mph).
The 2010 Porsche 911 GT3 was unveiled at the 2009 Geneva Motor Show, available in Europe from May, in the US from October. To make the GT3 safe for less experienced drivers, the stability control system is available on the 2010 model year GT3 for the first time. Changes to the exterior are only subtle still recognizable bringing about aerodynamic improvements. Total downforce has been doubled. Power output rises from 415 to 429 hp with the new 3.8L engine.
