I just installed the Gibson SS Headers and SS Single Side cat-back on my '05 4.7L Dak and they are AMAZING!!! Not only did I feel a surprizing improvement in performance, but they sound great. Not too loud, not too discreet, but just right. Just loud enough that you can tell it's aftermarket, and it has a GREAT tone too it. Very bassy, very nice. I'd highly reccomend it.

any sound clips?

Unfortunatley not. I tried to record some, but I can't get them to transfer well without really distorting the sound. You'd have to be insanse not to think it sounds nice though. I haven't showed it to one person who hasn't loved it.

I've been looking around and have not found a thing yet. Somebody at Dakotatrucks.com found some JBA headers for though. Sounded pretty good.

I had my exhaust done this morning. Had a single side out 3" cat back with a Flowmaster series 40 Delta Flow installed. Has a nice throaty rumble to it. But at cruising speed very little noise inside the cab. Even with the windows down. $227 out the door. Could have had a Gibson cat back installed but it was $379 plus installation. Now all I need to do is start saving soda cans so I can get headers for it next year!