I have a new flowmaster American Thunder ( 2 Chamber) cat-back for the 99-04 cobra with IRS. I decided to go a different direction so I wont need it. it's got only a few dyno passes and about 50 miles of test driving done with it installed. The price will be 250 plus shipping or if you live in or around dallas you could save some money and I would meet you somewhere around the Tyler or Longview area. I can be reached at [email protected] or you can send me a text to 318-489-0256