Re: bad cat??
If you have the proper tools or know someone who does you can 'gut the cat'. Which is taking the crap out of the cat and then reinstalling it - or a straight pipe until your next emissions check is due will be the way to go so you can save up some $ for a new cat. Inside it's mostly a honeycomb mesh that absorbs particles to reduce tail pipe emissions.
'00 Durango R/T 360ci 290hp (modded); 138,500m
'06 Pontiac G6 GT 3.5L 220hp; 44,000m
'12 Chrysler 200 Limited 3.6L 283hp; 13,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!