American Thunder is right!
I was looking for an exhaust system to breathe life into my 4.8L V8. My stock exhaust was doing it's job perfectly; my truck was virtually silent - not what I wanted my truck to sounds like. This exhaust provides a nice deep tone at mid RPM's and a low throaty note at idle - even on my relatively small displacement engine. Installation wasn't as easy as some reviewers had proclaimed, but it wasn't terribly difficult either. I don't have a lift and didn't even bother to raise my truck.