My 1996 993 has failed its smog test because I have an aftermarket catalytic converter. After 1996, certain aftermarket parts have to be approved by the California Air Resources Board. Apparently, there are no approved aftermarket catalytic converters for any Porsche for 1996 and newer. I am being told that I must put a factory catalytic converter back on m car, so that it can pass the smog test, despite the fact that the car passed all of the tail pipe emission tests. Has anyone run across this problem? Am I getting the straight story?
Glenn