Dodge Viper SRT10

The vicious Viper SRT10 Coupe and Roadster are reborn for 2008 with a beefed-up V10 engine that now produces a full 600 hp. That translates to a 0-60 mph time of less than four seconds. It's further enhanced with a new six-speed manual gearbox and speed-sensing limited-slip differential, along with upgraded brakes and functional air extractors on the hood. It may not last in the lineup beyond 2009, however, which could make the Viper a future collectible.