I sadly have the factory head unit and speakers and would love the drone of tread to drown it out on any day. Nickxj94, you say you have 4.5" lift with 3.5 backspace but do you have any clearance issues at all. Like I said 3" is what im looking at for lift, also from your avatar pic thats alot of flex, running swaybars? I have a buddy that has a 4.5 and doesn't run sway bars and he said he runs down the highway at 65 70 no prob but sounds a lil crazy to me. Mine never gets more than 65.