Which brand of cat are better?

 

Their all EPA compliant, a couple are also Kalifornicate compliant, so pick one based on where you live

 

what is wrong with the one you have? It is rare these days for a cat to die early in life.

 

Ok guys I'm here again and now I'm confused cuz I replaced de rear cat I mean the bottom one and now my mdx feels worst cuz after 50mph doesn't feels the over drive when I press the whole pedal and feels like nor moving fast at all
Maybe have a leak or the aftermarket converter has any restriction. Planning to test the original stock again moving the new sensor too to see if there are any improvement. Any help here guys
I'll appreciate it

 

P0420,p0430 that's the problem excessive mpg, and now loss power after 50mph no feel the overdrive either