to give you an idea the DC sports header has a 2 inch outlet, and thats one fo the better headers you can get
(2 or 2 1/4 is prime for an N/A setup IMO)
Resonators will get rid of some mechanical crappy soundingness as well as the high pitch buzz (though it depends on which one you get, they'll all sound different)
Personally I like the sound that a glasspack puts out, it makes it a meaner tone and muffles it a bit better
I didnt notice much of a difference in loss of torque when i put my 2 1/4 exhaust on, just judging by butt-dyno, the top end was a noticeable change though
Edited by stevo911_, 23 October 2006 - 05:02 PM.