[1980camaro]

hi i have some questions about catalitic converters. do they make straight through cats or do all of them restrict a little if so whats the best flowing. do cats take the place of mufflers. i was wanting to put dual exhaust on my camaro but nobody will do it unless i put on cats so i guess i will just bite the bullet and do it, but i still want the best flow i can get.

 

[poncho62]

The theory behind a cat, is that it superheats the exhaust gasses to burn up unburnt polutants....thus a cleaner exhaust and lower emmisions..

There are less restrictive cats available.