Hey I have a problem my exhaust smells like sulfur and or rotten eggs also the check engine light just went on. I think it maybe the cats. has anyone put on after market cat before? where is a good place to buy them and o2 sensors? I have looked at eastern, catco, and theyare direct replacement bolt on's. any ideas? Guess I am going to put headers on while i'm at it. anyone know a reputable place to have them coated? jet hot is expensive.