The Porsche 997 GT3 model 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 engine has the same displacement as the Turbo, but without turbocharger and uses a new variable intake system. The engine is rated at 415 PS (305 kW; 409 hp) and 405 N·m (299 lb·ft). 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.