Second generation Viper increased engine power, improved suspension, and reduced braking distances; the 1996 to 2002 Viper GTS had a 450 bhp (336 kW) engine, which could complete the quarter mile 0.7 seconds faster and increased top speed by 35 km/h (22 mph) or so. A number of third party firms have modified the car to boost performance.
A coupe model, called the GTS, was also introduced in 1996. An interesting feature of the coupe was the "double bubble" roof contours; two small humps to accommodate drivers wearing helmets. Indeed, the Viper's performance has made the vehicle popular for both amateur and professional racers. Vipers can be seen participating often in drag racing, road racing and drifting. The GTS, like its predecessor, was chosen as the pace car for the 1996 Indianapolis 500.
Source: Wikipedia (original)