I coulnd't find anything off the shelf that sounded the way i wanted, so I pieced my own together.
I have a Spin-Tech muffler (dual 2 1/4 in, single 4" out), and a 4" Diesel Dynamics tailpipe.
I had to make up the hanger rods (3/8 316SS), they were easy to make, some heat and a vice.

It has a nice deep throaty tone that does not resonate in the cab. It can be lheard inside, but it is more of a growl. get on it though, and it barks!! :D

Definitely helps the mid-range torque. Pulls much better. Of course this is just seat of the pants, i did not have a baseline dyno run before the exhaust.

Next is a set of headers and the DTT tc/vb. That will wake-er up