ok, im kinda a noob to 4.6 motors and the whole mustang thing and i just got an 04 GT and im planning on getting an exhaust for it. I plan on getting an X-pipe for it but thats where my question is, is there any significant power/torque difference between a catted X-pipe and a catless X-pipe? heres the setup im planning on doing, stock manifolds to a pypes catted or uncatted X-pipe,with a bassani catback.