I have a flowmaster 44 on my 2.5l it it really sounds like a mail truck when i cruise at around 1800-2200 rpm. I dont really like it. Idle sounds good and real low range sounds fine but just that area. Its like MMMBAAAAAAAA hahahaha i cant explain it any other worry sorry guys but if you literally think of a mail truck its my jeep. Do i have something wrong or is that just the muffler?