Hey there are offroad only vehicles that are cat exempt. A well tuned motor won't spew black sut out of the exhaust. I am NOT telling anyone to remove the cat this is illegal and can result in a hefty fine. My opinion on cats are that they are there to mask a poorly tuned vehicle that most of the general public drives. I have read several boards where people actually pass inspection just fine on the sniffer only test with no cat. Again this is just an opnion and I'm sure some of you will disagree. Bottom line is removing your cat is ILLEGAL.