ok. so yours is 2.25 inlet/outlet whi answers one of my questions. the body is 22" long and the whole thing is 28" long. which means that i can easily fit say a 19" long oval resonator (which is about the length of the stock one)...right? well, since the stock one is 4x7 oval, would a 4x9 fit in there (in terms of width and height)? and does it really matter if it is offset/offset or center/offset?? from the way i see things, it can be pretty flexible down there. people fit all sorts of things, right? and lastly, which one will be louder, a 22" long circular or a 22" 4x9, or 19" 4x9??? wow, sorry again for all the questions but i need some help in my decision making. thank you!!!