The Saturn Ion Redline is one of those cars that you wonder why they built. The quad-coupe Ion itself, complete with an unusual set of doors and polarizing styling, is a strange car to begin with. Then, somebody decided it was a good idea to add a supercharger, a limited-slip differential, and a host of other goodies. Rather unsurprisingly, not many were made, and they're very rare today. One mint-condition example is for sale in Illinois, though. It might be the cleanest one left in existence.
