I love that Corsa sound! Check out the sound clip section; that ZO6 Clip is plain exotic.....
I have a couple of weld in Flowmaster 2 Chamber 40 Series. That sound nice but after hearing my buddies Corsa on his 03 Denali......I want a set. A bit raspy at idle but it sounds like a race care when he revs.
http://www.corsaperf.com/mustang_db.htm