WTH? How about if you read and think before you write? It gets more air, due to more surface area, obviously. I'm not sure it's cooler in this case, so density might not be a factor. The heat "sheeld" (what is that, Canadian?) does not "cool down the air" unless the material it is made of has some magical properties. Waste horsepower trying to get more air? Where does the horsepower go, around to the trunk looking for air? How about the engine does not produce as much horsepower because it can't get enough air. You are obnoxious.