The latest is this one-of-a-kind shifter kit with a jet engine built by "Turbo" Tim Arfons, according to Winding Road, who is the son of Bonneville Salt Flats legend Art Arfons. The kart features ...

Yet, this off-road electric shifter kart is the one that looks like the most fun out of the group, though just as dangerous. Powering this righteous plaything is a 28,000-watt electric motor kit ...

It all leads up to the ultimate in karting: the 125cc shifter kart. With a top speed of 120 miles per hour, the shifter is no toy. "When you do open it up, my god, it goes fast," said Patrick.