I agree. The main purpose of CAIs is to force cold air (more air) into the intake as the car moves, thereby making combustion more efficient. However, after observing the 1.8 E Civic's intake layout, I noticed that hot air from the engine bay is isolated thru that rubber flap on the hood, and there is another flap, maybe a port unconspicously located at the bottom right side of the bumper grille I reckon it serves to scoop air also, mixing with air coming from the upper grille.