Lol, no. When you're dealing with wet manifold design, the temperature of the incoming air really doesn't matter that much. (unless you're driving through a wildfire with ambient at ~170F) Due to the fuel being introduced high in the intake tract, you get charge cooling associated with the phenomenon known as latent heat of vaporization. We already know that figure is roughly 150Btu/lb when measured at ambient, gasoline weighs 6lbs per gallon so in theory it's transferring in the neighborhood of 1000Btu of thermal energy out of the combustible volume for every gallon used. AKA - the base of the throttle body is always cold, even though it could be 100 degrees outside. The ducting OEMs use has more to do with introducing air to the engine at a stable temperature, than actually benefitting the combustion process. I agree though, cooler air can be of benefit seeing as it's denser, and more fuel can be combusted in that environment even though it's not increasing the actual volume of air introduced. Warmer air (to a point) is actually better for the combustion process, since it's less dense it causes less of a parasitic draw on the engine, and the warmer the air the more likely the fuel is to stay atomized.
No it won't hurt anything. It'll sound like ten thousand screaming ****** when you floor it with the windows up though. (may or may not be a bad thing)
