exhaust resonance

[nightrider]

i cant stand the resonance in my exhaust system, the only type a cat i have is the y pipe cat then a flowmaster muffler. is there any way to get a deep low rumble, my old impreza L had a can muffler or N1 and the rest was stock and it sounded awsome, it had real deep rumble. how can i get that sound in my svx. it resonates from like 3,000 rpms and up .