I'm looking to get a new exhaust set up for my 2006 Mustang GT. Currently i have stock cats, stock headers, and pypes muffler delete axle back exhaust. I'm looking at buy, New headers, New cats, and pypes bomb axle back. I need help on whether i should get Pypes long tube or short tube headers, and whether i should get Pypes o/r x pipe or o/r h pipe? I NEED HELP!!