I just got done installing my magnaflow tru-x with stock cats and no resonators with GT500 axleback. Hers a couple pictures and hopefully I can load up these before and after videos. I think it's actually less raspy and smoother but not as deep. I like it better with the Tru-X.
before
http://www.youtube.com/watch?v=BESY50T7k2U
After
http://www.youtube.com/watch?v=KtgtJ3CfAak
before
http://www.youtube.com/watch?v=BESY50T7k2U
After
http://www.youtube.com/watch?v=KtgtJ3CfAak