Yeah I know.. All 6 holes are 2x9. The upper grilles were measured in the center. I put some duct tape behind the grilles to check temps before I cover them flush. Knowing the car is a bottom breather I think the upper grilles lets heat out in traffic. As for the lower 4 openings, the outer two openings only give about 50% direct flow to the radiator. They are being shut this week. As you can see in the photo below. Then depending on temps the other two will go away shortly thereafter.
These photos shows the underside of the nose. The bumper cover is an inch lower than the radiator support. The under tray (missing) goes from the rad support to the front crossmember. If I put a chin spoiler on the rad support that is a little lower than the one the factory put there (mine is missing but you can see an original in the first photo of this thread) I think I will have plenty of flow for engine cooling.
