Get the Staintune collector pipes. It replaces the Tbird catalytic converter. You can keep the stock exhaust cans (mufflers). I did this today and my 1700 has way better sound and noticeably greater hp! Get on staintune site, search for Tbird collector pipes, and then ignore the need to order through dealer. Email them and they will let you give credit card number, i got 'em in two weeks delivered to my house. The power is WAY better, the sound is awesome. Cost about $565 total. The cat is the choke on sound/power.
Last edited by tomfleming; 09-27-2011 at 12:15 AM.