Based on the previous 911 GT3, the 2003 Porsche 911 GT3 features a 3.6-liter, flat-six cylinder engine producing 285kW and 385 Nm. The engine propels the GT3 from 0 to 100km/h in 4.5 seconds and the top track speed is 306km/h.
To handle this increased performance, the GT3's transmission is fitted with transmission oil cooling and injection oil lubrication and has undergone some additional reinforcements.
The most striking visual feature of the new GT3 is its unique rear wing that is largely responsible for excellent directional stability at high speeds and increased down force for fast corning. Combining a redesigned front apron, the GT3 achieves an outstanding drag coefficient (Cd=0.30) for a car in its class.
The GT3's handling is further enhanced by a sports suspension, wider and lighter wheels, and wider tires. Front wheels are 8-1/2 inches wide fitted with 235/40 ZR 18 tires, and rear wheels are 11 inches wide with 295/30 ZR 18 tires. The sports suspension of the GT3, with a centre of gravity 30 milimetres lower than that of the 911 Carrera, was fine-tuned.
Brakes on the GT3 have been improved as well. Front brakes now feature six-piston, rather than the previous four-piston monobloc brake calipers and larger discs fitted with Porsche-patented cooling ducts.
The ABS brake system was also modified. The new system has a faster and more sensitive control response. It is also lightweight and provides greater stability for ABS braking. Porsche Ceramic Composite Brake (PCCB) discs, standard on the 911 GT2, can be fitted on request
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