Walker Aftermarket Cat
 

Asking $180 plus shipping, plus PayPal's 3% fee. This is a full OEM replacement (generally available at Advance/Carquest/etc) and has never been used. I exchanged my old one, where the cat melted, for this one. Typically retails for $250+. Worked fine for me otherwise and bolts right in to the stock system. No noticeable loss of power over the stock cat either.
https://cimg8.ibsrv.net/gimg/www.rx8...ea2614e509.jpg

https://cimg2.ibsrv.net/gimg/www.rx8...7038ab8808.jpg