Side Pipes
I have them on my Cobra, and since it is essentially a straight exhaust, it sounds very good (meaning LOUD) which is appropriate for that car. I do not have problems with the wheels, but the burn hazard is very real, and a serious problem if you show the car. I eventually converted mine to the "original" Cobra style, where the exhaust exit is in the same place, but the pipes are under the car. That eliminated most of the burns, while keeping the sound.
A normal exhaust, with mufflers of some type, is hard to tune so it sounds good because you "hear one side". The Viper has struggled with this problem, aggrivated by the V10, and that's why in the newer ones, they use a rear exit, even though the exhaust is still routed thru the sills.
I have seen body color side kits for the C4 which I think look fabulous. But I would have to hear them first.
Hope this is helpful.