Well, my stock exhaust finally bit the dust and I am looking for a new one. I have the '03 5. 9 w/o the catalytic converter. I mostly use my trick for daily use, occasionally pull a travel trailer. I am looking for a 4" exhaust that is not much louder than stock at idle (inside and out of the cab) or cruising speed (70-75) (inside the cab). Want to avoid the dreaded drone I have heard about. Any suggestions????