Instruct: Classify the given review as either positive or negative.
Query: Not legal for California

I ordered this thinking that it would permanently replace my air intake, but I found out that this intake is not legal in CA. That means that the next time my car needs a smog check I will have to put on the old intake to pass. It would have been nice to know that up front. Anyway, installation took about 2 hours and everything went in pretty well. I have not noticed a big increase in power, but it is definately louder! Almost too loud, though there is not much difference at cruising, just when on the throttle hard. I have yet to see what it has done for gas mileage.