STi is by far the best quite muffler out there. It performs well and looks nice too.
I've had one for quite a while and really hope to add borla headers, but haven't rounded up the $$$ as I'm trying to get money together to get the FHI version 5 suspension as I can benifit more from that first I think.
2.25" SS non-resonated Strogumn midpipe and STi version 4,5,6 back box is what I've got.
Purchased from SPD at $409 shipped.
Love the sound and doesn't get a lot of attention, nice low sound. It's the rally blue and RS spoiler that gets me attention, not the exhaust. I recommend this set-up very highly! No droning on the interstate or highway like my friend with the Strogumn.
Midpipe is improtant, but the back box will do more off the bat.
Thanks - Jon