No after Cat 02 sensors to worry about but I do have those pesky California emissions tests to pass. Actually, to hell with them and their strict *** rules. I don't need no stinkin tags man. I see vehicles on the road everyday that don't have current tags, and in this economy they got alot of nerve expecting me to pay smog and registration fees when their already jackin me every time I put gas in the tank. Lower the price of gas and I'll pay my registration and get my **** smogged. Otherwise they can go piss up a rope.