You don't mention it, and you may already know...
You should not be able to pass SMOG and successfully register your car in California w/ any turbo kit that I know of. Unless it is a CARB (California Air Resource Board) certified modification, with an engine compartment mounted certificate sticker, you should fail the visual inspection.
Additionally, I believe it not possible for a single turbo setup to get a CARB certification due to exhaust temperature issues w/ extra piping length between the combustion chamber and the catalytic converters they require. Also, I do not know of a twin-turbo kit manufacturer who has spent the crazy amount of money it would cost to go through a certification attempt with CARB.
If you don't want the hassle of a non street-legal kit, you would need to stick to one of the CARB certified blower kits. Even those are only certified w/ a small level of boost, and the cert entry in the CARB database for testers will instruct them to measure your pulley diameter to ensure it corresponds to a legal boost level. That makes the quick pulley changes on a KB setup helpful at SMOG time.
Not sure how much of this you already know, but I didn't think it would hurt to mention it.
FYI:
I had issues trying to SMOG because of my
K&N FIPK CAI. I had mounted the CARB sticker in the engine compartment when I installed it but had thought it was a funny joke at the time. However, during my next SMOG, the tester hadn't seen the sticker in the engine bay and came in to ask me about the FIPK before he just failed me. I showed him the sticker, he looked up the reference number in the CARB database, compared what was in my car to the description he found there, and only then passed me. All that for a CAI, not a turbo kit. Just sayin', gotta love government intervention.