[sd_boxster]

Your car is unlikely to pass smog. You're probably going to get a MIL (check engine) light because of the headers (you can't pass smog with a check engine light). If you wind up at a shop that knows anything about your car, you will also fail the visual inspection. I have no idea if you'll pass the tailpipe sniffer.

Unless the headers you bought are CARB certified (and I can't imagine they are), your car will not be smog legal. Tampering with the emissions system, especially in the People's Democratic Republic of California, is a no-no.

If you haven't already installed your headers, save yourself the hassle and sell them to someone else...