Now ready for production: the Chrysler Tomahawk, a four-wheeled motorcycle. Why so many wheels? The Tomahawk needs them to handle the power from its monster 500-hp Viper V-10 engine. Each wheel is separated by a few inches and has independent suspension.

Inside the Tomahawk's 1,500-pound frame, the engine breathes through twin throttle bodies mounted up front, giving it the ability to rocket up to speeds of over 300 mph with a 0-to-60 time of 2.5 seconds.

Though they share the same engine, at $250,000, the Tomahawk will actually be priced higher than the Dodge Viper.

To read about the amphibious Splash concept car, click here.