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Porsche made significant updates to the GT3 for 2004 (the first year the car was offered to US customers), using the 2002 996 facelift including headlights that were differentiated from the Porsche Boxster. The 2004 version is commonly known as the 996.2 GT3.[2]Horsepower was raised to 381 hp (284 kW) and torque to 284 lb·ft (385 N·m), 80% of which was available from 2,000 rpm. The braking setup was upgraded, now featuring 6-piston calipers on the front (rears remained 4-piston), and the Porsche Ceramic Composite Brake system was offered as an option.
In track testing by American automotive journals, the GT3 managed a 0-60 mph time of 4.5 seconds and a quarter mile time of 12.0 seconds at 118 miles per hour (190 km/h). During skidpad testing the vehicle posted 1.03g.
Porsche's official test-driver Walter Röhrl completed the Nürburgring Nordschleife with the 996 GT3 in 7 minutes 56 seconds, a feat which was used by Porsche to promote the car."
http://en.wikipedia.org/wiki/Porsche_911_GT3#996.2_GT3
