Originally Posted by karmakc
Only two types of CAI are legal in California.
The K&N FIPK Series II
and the now discontinued Cosworth CAI -- sometimes you may find them available in the used section.
According to K&N they do not make a CAI that meets the CARB requirements. I called them up because I could not find on on their site. Everything listed there for the Focus, even the FIPK II series, said no for CA. The guy I spoke to on the phone told me they don't have one. He said he lives in CA and has a K&N on his car (not a focus) and he just swaps in his factory stuff for smog.