Loss of mechanical grip becomes a real thing on the road course and when you start moving these cars at speed. These cars are all style and no aero. Before my motor blew in 2012, I started playing with a bunch of aero mods. The most notable one was a massive air dam that went from the bottom of the radiator to about 2" off the ground. If I were to add rear wing, I'd probably have to add a splitter as well.