I have a Steeda Stainless Side Cat Back Exhaust for sale $400 OBO. have 9-10k on them stainless is still shining the bottom side of tips have a few scratches can get pics if interested. Retail at $870.99 and unlike most side exhaust doesnt rob HP (according to Steeda)heres a link to a new one with description STE-040-13912 - Steeda Stainless Steel Side Exhaust (99-04 Mustang GT and Cobra) - Side Exit Exhaust - Mustang Performance Parts