Your only option for new one in CA is to buy a CARB approved cat, they cost about double what they used to, I paid $153 for a new one at Riebes in January. You could always run over to Sparks and buy one at Summit Racing, then swing by the Cabela's store in Reno and buy anything else that the CA gov. has deemed unfit for sale(but still legal to own) for its citizens.
