Want deep sound? Get a turbo, heh they steal sound, anyway. On my TII I have Bonez, DP and MD, 2.5". The Borla Catback makes a nice pur at idle, sound real deep. The 3k resonance on my car is monstrous. But over 4k no mufflers or pipes will take away that scream from a rotary. Borla is expensive though, $599, but I think they are extremely good, plus they look pretty much stock, they don't poke out too far, or have a ricey angle to them(although that looks pretty nice). The tips are relatively small and have the classic Borla look, check em out at Borla.com.

 

I got the RB cans

 

It's deep, yet tolerable. I like It. I forgot to mention I have a custom made s.s Silencer aswell made by Brullen. So the catback and the silencer put me back $1100 can.