From what i've been told, it's cost prohibitive unless you're a company that sells A LOT of CAI's. I think it takes TENS of THOUSANDS of miles of testing to achieve one. I'm not sure how it works but I don't see how K&N, Injen, and Airrad, with their open top boxes, can get a CARB sticker and any of the others can't. Do companies that sell thousands of intakes for every car known to man get a rubber stamp from the EPA? I just don't see any of the above being any more ecologically friendly than any of the other open top CAI's.
