Originally Posted by TheLex

Hello. I just purchased a 1986 560SL with a bit less than 100k mi. Unfortunately it does not pass smog here in Calif. I was told that the main catalytic converter is blown. As I browse the various cats for sale online, I sometimes see a disclaimer that the cat is not for sale for OBDII 1995 on. I'm confused as to what this means. Calif apparently has very strict regs on replacement of the cats. Do I have to purchase a OEM MBZ cat or can I use an aftermarket one? I can't afford an OEM MBZ Cat!