What's the lightest possible vessel for the Viper engine? How about a four-wheel motorcycle made of billet aluminum? Power-to-weight ratio, along with shock factor serve as the impetus for this concept. Dodge's "bold-faced slap against mediocrity" features a 500-hp, 505 cu. in. Viper V-10, a two-speed gearbox, and four tires. We don't think it's going to corner so well, but Dodge estimates a 0-60 mph time of 2.5 sec. and a "potential" top speed of up to 400 mph (for anyone who wants to test it). It's no wonder the Tomahawk requires 20-inch perimeter-mounted, drilled and machined stainless steel brake rotors in each wheel!