My buick didnt have the upper one and from what i see they dont come with them. I had broken the lower air deflector and had taken it off. I had made a radiator plate out of stainless and made a lower pan to smooth the air out from the radiator to the frame. That had made a 15 degree drop at least. This was on a 95 degree day. As of lately it has actually dropped more adn the car runs much better. Its amazing how such a small thing can make a huge difference.