Beginner needs advice!

Autobahn

Thanks for all the suggestions everybody. By the way, I didn´t really feel offended by the "humorous" posts, but a little annoyed. It turned out that this forum is operated by respectable moderators..thanks guys. The reason why I don´t want to change the sound that you hear from outside of the car is simply because I personally don´t want to be heard from 10 miles away. I recently drove a porsche cayman s and compared to the 370z it sounds like a "real" sportscar from the inside, but quite decent from the outside....hence my question.