always wondered what that talked about drone sounded like.put new camper on last week,pulled a grade and the noise was a little annoying to say the least. 01 psd came with 4" exhaust ais intake,dont know brand of exhaust sytem & muffler.? would a different muffler help.
My Diamond Eye 4" came with a very nice stainless muffler. I also ordered the delete pipe so I could try it straight-piped. Well the muffler had a very nice sound & not much drone, but no whistle, so it came off.
If there's a muffler on you shouldn't be getting drone. I had mine straight piped and the sound got a little old,it had a good sound,but it sounds much better with the muffler on. I have a Magnaflow 4" SS turbo back....with muffler