I recently had a chance to check out a Ferrari 360 with an aftermarket Tubi Exhaust. In my opinion, the car sounds great. I feel the idle and engine note are terrifically musical, plus the pipes catch the eye as they exit the vehicle.
I shared my views on aftermarket exhausts for exotic cars with multiple people and their thoughts on the subject were very different from mine. One Ferrari owner told me that putting an aftermarket exhaust on an exotic was wrong because it is contrary to the original designer's vision for the car. Additionally, a Ferrari dealer was put off by the idea of aftermarket exhausts even existing for exotic cars. He made the point that the exhaust notes of exotics are "factory tuned" for a "perfect sound" and that any changes to that sound violate the spirit of the vehicle.
I feel it is fine to put an aftermarket exhaust on a supercar. Why? Because doing so allows the driver to make the car his own, thereby making the car more enjoyable. Enjoyment, after all, is a huge reason for owning an exotic car.
What do you think? Should aftermarket exhausts be installed on exotic cars (why or why not)?