Greetings TMC,

I fired up Ol Paint last night and I think the cats have seen a better day. To me the car is very very loud, with quite a rattle until it warms up, and the exhaust fumes are getting stronger. With that said, is there a catalytic converter that is better suited to supercharged engines? Are the cats on a Cobra or GT500 any different than those on an NA Mustang? If you had to or have already replaced the cats, which brand did you go with and why?

Thanks