In my search for a catalytic converter for my 1987 rx7 n/a I had a few problems. Cal legal cats are very expensive. A magnaflo is almost $300.00 for the rear cat. Some research on the internet and two failed orders ( no one will ship an illegal cat to Ca.) later I found Hottexhaust out of Canada. They sold me the same Magnaflo cat for $140.00 delivered to San Diego. Hope this information can help someone else.