Just an FYI, you install a header your exhaust is going to change dramatically sound wise. I ran with the Armor coated Pacesetter 4-1 and a one off 2.5" header back exhaust 2.5" high flo cat, 18" magnaflow resonator, and dual Magnaflow oval mufflers.
Disregard the rust... : Looks for sand blaster online:
Here are some sound clips.
http://media.putfile.com/RDFABS-W-Resonator
Its very very deep toned ( that slight rasp was because it was a cold start up, when its warm its not there)