MikeD said:
Adding a resonator such as Dynomax Race Bullet after the cat would help alot. That what I'm using along with Dynomax UltraFlow out back. All 3" thruout. They're amazingly quiet (no drone). HTH
Yep, thats what I did this weekend. A dynomac glass pack resonater. Worked like a charm, I love my exhaust note now. Beautiful idle, sounds great under load, and its just quiet enough for cruising as to not get tiresome. I wouldn't have needed it had I sprung for a decent muffler up front, but I got this one for free so I can't complain. It has no perferations at all, its just a solid straight pipe.