So I currently have stock H pipe and MAC catbacks dumped. Sounds good but not GREAT. I like the drone and I LOVE the bellow of American Muscle. I was thinking about running a set of Flowmaster 40 series but can't find them anymore on americanmuscle.com. Any tips or suggestions from your experiences? I know that all exhaust systems are not made equally, and I also know that it is subjective to your particular taste and like vs dislikes. What do you guys think sounds the best on a 97 GT. 3.73 gears. Stock h pipe and headers.