I highly doubt my cats are clogged, everything still operates perfectly, up until I hit that speed bump and bottomed out my cats on the speed bump. My brother told me its possible when I hit the speed bump the exhaust got pushed up towards the floorboard of the car and possibly caused the sensors to crack considering their so fragile. I need my cats, I am a Vehicle State Inspector and when the state comes by they check out my car to make sure the inspection was done correctly otherwise I lose my certification.