If you've seen a Polaris Slingshot on the road, you have to admit, it looks pretty radical. The low profile and angular style is almost guaranteed to attract attention, but what if you swapped the single back wheel for a real push rod/rocker independent rear suspension with a limited slip 3.53:1 differential? You end up with sort of a Lotus Seven or Caterham roadster, but with radically updated styling. Now there's two wheels to get the power down along with lots more grip in the rear for high speed cornering. Pretty cool.
The whole conversion is a bolt on. No cutting and chopping to make it happen so the original Slingshot is still intact. Bullet Speed and Design in Holiday, Florida builds the kit and, at least for now, it's only available if installed at their location. You need six weeks lead time for them to build all the parts and then your Slingshot will spend two days in their shop getting the work done. The kit comes in a base version for $10K or an R-spec version for $12.5K.
Any good looking 3 wheeler with decent performance is always a potential 4 wheeler for someone with the right skills and tools. These guys couldn't resist the temptation and the result looks mighty fine. They don't provide any performance figures so it's not clear what it will do compared to a stock Slingshot, but I'm guessing it beats it without too much fuss.
Licensing for the road? Since it's a bolt on, it could be just like the Q-Tec conversions and legal in most states. We'll see, but it sure looks like a lot of fun to me.