Hello My name is Brian proud new owner of Bullitt 2148 I was wanting to put on a couple of more aggressive sounding mufflers nothing crazy just a little more growl. I was wondering if the exhaust on these cars are 2 1/4 or 2 1/2? I am just wanting to do the mufflers. I had Pypes M80 on my 04Mach 1 and liked the deeper tone. Please let me know if anyone has a muffler set up they like. Thanks much for any input. Brian