Then what does that say about the stock Air Box. Because K&N Filters are proven to breath better then standard paper filters. Now I don't know, because I never saw the K&N filters for our cars. But does the K&N Filters have the High spot low spot filters like the stock filters, or is it flat, with no size variation. My only experience with the flat filters, was with My 01 Silverado. I had that style of filter in before I put an intake on it. I have more experience with the cone filters.