Im looking for a new exhaust for my 2003 cummins 2500 and i would like one that is a little louder than stock but not too loud. Any suggestions?

 

Turbo back 4" is fine - ditch the catalytic converter if possible and get a flow through model muffler- I have a no name flow through with cat delete and it doesn't drone much. Diamond eye will be the cheapest kit available

 

Agreed. I have the Expandit brand turbo back 5" system on my truck. 4" would have been fine. I used the semi-style exhaust band/clamps so that when I want more noise all I have to do is pop the muffler out and stick the straight pipe in. Takes 10 minutes to swap over. Finished my system off with a nice stainless 6" turn down. Keeps the heat off the bumper and whatever I'm towing.