Installed on my 2004 RAM 1500. I didn't remove the resonator so it's pretty quiet at idle. At idle it is very similar to stock. However, when you put it under load and hit around 2000 rpm, it sounds amazing. Good deep throaty rumble. Maybe at some point I'll remove the resonator to make it a bit louder, but so far I like it. Absolutely no drone at any speed. I love the fact that it is high quality stainless steel. I am very satisfied with my decision for the Flowmaster.