what is the best sounding exhaust combination for a 96 cobra? i am trying to decide on a catback and either an off-road x or h. i do not like the backpressure popping that i have heard with some combinations. i want something to be somewhat raspy but i want the low rpm rumble as well. i would like to try something else than the typical 2-chamber/hpipe combo i hear on 90% of mustangs. help me out. thanks.