You shouldn't need any emissions system upgrade/modification to pass the smog check in California, assuming your current emissions system has not been tampered with. A used vehicle which has all the Federal required emission components, can pass the California smog inspection process and be legally registered in this state. It is true that California cars have different, and in some cases more, emission components then Federal cars, but this does not mean that these cars can't be registered in California.
posted by SmogTips Support
