No, they dont. This is old-school thinking. The flow characteristics of a modern "dry-style" intake are alot different than the "wet" intakes back in the day. Modern intakes deal with flow and velocity. The "wet" intakes were designed with "atomization", "puddling", and "fuel-suspension" concerns. As far as CAI, I doubt anything could be seen except on a dyno. And most of these gains are only in the upper RPM ranges where you only spend a second or two.