Hey guys i need your help...i'm not very knowledgable in exhausts and i want a 3 or 3.5" muffler but not a fart cannon.  Preferrably stock looking.  I was wondering when i get my exhaust bent by the shop to 2.25" piping...at the end do i need a muffler or would a tip just work.  My friend had a glasspack before his tip and no muffler in his GTP.  Also should i go header back or cat back..and if i go header back will i need a hi flow cat converter?  Please give me some info and suggestions.  i dont want it too loud but just for it to sound decent.  I want to keep the dual exhaust (one on each side) goin with my car.  any help is appreciated...thanks  
 
 
Well, I would do a header-back exhaust.  You'll notice the most gain by doing it all at once.  I'm doing a new exhaust pretty soon that will consist of a pacesetter header to a high-flow cat to a dynomax super turbo muffler.  All with 2.5 inch piping.  I'm also fitting the largest resonator I can in there to quiet it down.  When all is said and done it should be pretty quiet.
 
 
sooo, a really big resonator will help quiet it down... is stock good enough with a hushpower II muffler????
 
dave is my hero... so I have to go as big on everything as possible, thanks to everyone for all their help... get the advice coming