I have a drone from the exhaust system on my ram van 2001- 5.9. It only does it in third (the most) and (much less) in overdrive at 900-2100 rpm at part throttle, coasting is totally quiet other than road noise. What ideas can you give to change-adapt to my single exhaust system? By the way,new muffler and cat, stock system.
Thanks

Last edited by cudaman1969; 09/24/18 07:21 PM.