[Kenth]

Take the car for a spin, any day, hot or cold, drive at normal highway speed, stop a little quickly in a safe place and touch the carburetor. It is hardly hot, rather cold, and that is due to the rush of air thru the venturi. Without the crossover, it would be even colder and if the air were moist, in the worst case, there could be ice formation in the venturi which interferes with the carburetor's function. Those who advocate a cold carburetor and a cold intake have probably misunderstood the meaning of denser air, it is the AIR TO the carburetor that should be kept cold (dense) not the carburettor/intake itself.

FWIW