Welcome. My advise would be to keep the mods minimal, tasteful, and simple. i wouldn't do the exhaust mod. This is a rare vehicle, the more unmolested, the better. Also, it shouldn't sound like a motor boat. At one time it was a 47k dollar car. If you want a nice exhaust go with a complete system that has been designed to sound good. Keep your original one too since, again, these cars are rare.