I'm sure this has been beat to death, but I couldn't find the answer I'm looking for by searching.

I am thinking about putting a Dynomax Ultraflow Single in Single Out on my 08 Quad Cab Hemi. I'm thinking Dynomax becuase of the mpg increase I got on a Ford V10 I once owned with a SuperTurbo. I think I want the Ultra Flow this time for a little more sound.

My question for you guys with the Ultra Flow, are you using the SS or the Welded. Also if you know, what part number ie Length. Also, how loud is it in the cab. I want some sound, but I use this truck for work, riding with clients, cell phone and such and do not want a loud drone.

You help would be very appreciated.