If you are going to pay $250 for an axle back(or catback) on OBX, why not wait until you have another 2 bills. Then you can get an exhaust system for a more reputable compnay(apexi, greddy..etc)

I have an Apexi WS catback($430 shipped from GBC) and it sound good, I don't notice any good gain but the sound is awesome(not loud at all )