I figured I'd throw this up first, since I know us 4-banger guys are constantly looking for an exhaust that doesn't make our trucks sound like a Civic with a fart can.
Jardine Cat-Back at URD
And just so you all know, I emailed URD, and they will sell the muffler alone if you don't want to buy the whole cat-back. You just gotta ask.
And here's a soundclip, provided by Who Dat Popcorn: