Gibson exhaust?
 

Anyone have the Gibson single sweep system? How quiet or loud is it? I am looking to put it on my 04 F250 with the 5.4. Would like to keep it as quiet or close to stock as possible. Thanks

I had the Gibson split dual on mine a while back. It was quiet at idle, but sounded nice when I punched it.

Do do what you are after, your stock pipe is fine, you really only need the muffler.

I wouldn't drop that kind of change on the Gibson. Just have a shop swap the muffler. The Dynomax Super Turbo #17792 is 3" in/out. I did this myself on my 05 F350. http://rides.webshots.com/album/550307918DFidJq