Hey guys, you may remember me from all of the poor gas milage questions. Well good news (hopefully), I took it to a mustang guy here in Florida and he said that the cats were cashed. He said this was probably causing the horrible gas milage, and he said the car felt a little sluggish. Well, if this is the case, then I'm pumped. Bad Cats means fixing the problem with a performance upgrade. I have stock headers (exhaust manifold?) and a stock cat-back with flowmaster mufflers. I pretty sure all of this stuff is 2 1/4 inch piping. I wanna get rid of the cats and put on an off road H-Pipe or X-pipe. What are the differences b/t the two and do you have any reccomedations? Thanks so much for your help, this is a valuable resource to me, as I'm new to the mustang game.
Thanks
Mike
Thanks
Mike