I searched for days to find an exhaust that wouldn't sound stupid when the MDS kicked in. This was not it. It sounds good while operating at 8 cylinders, but the MDS is definitely noticeable. It was really easy to install as I sprayed all joints and bolts with a penetrating lubricant days before installation. The hardest part was getting the old muffler out. I have a crew cab and you can definitely hear the exhaust inside the cab at pretty much every speed.