Where in California are you? I live in the bay area and they've always been annoyong about mods. I had a 20 minute with a smog tech about mods and before testing he said, "but if you don't have any carb stickers, I can't pass you."
I'm in the Los Angeles area. All the smog stations I've been to haven't told me anything about mods. They just run the smog test on your vehicle and tell you if it passes or not. They're not smog-cops trying to bust your balls.
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