I had the Banks monster exhaust on my 01 & the drone was real noticeable while pulling my 12,000lb 5vr. I have the mbrp replacement muffler behind the cat on my 05 & don't notice any drone. I have to roll down the passenger back window while pulling a hill to get that sweet rumble when it bounces off the retaining wall.
I could be a little deaf though, 31yrs of driving big truck will do that to a guy.
I could be a little deaf though, 31yrs of driving big truck will do that to a guy.