This platform of car is now over 16 years old, so just about anything you can think of doing to these cars has already been done many, many times over. Taking a few minutes to do some simple searches (preferably on Google, because the search feature on this site is not nearly as good) will show you plenty of possibilities for anything you may have questions on. For example, you can find tons of video clips of almost any possible combination of exhaust both on here, and on YouTube. BTW, there's no such thing as a "deeper sound", or rumble with a GM 90° V6 (other than maybe at idle with some exhausts). I have heard and read many people CLAIM "but MINE sounds good/not that bad" time and time again only to realize the owners are delusional when I hear their exhausts for myself.
