I would think it's a given that anything you do to reduce heat to the air intake would increase the power of a motor. Why else would the performance intake manifolds do away with that heat crossover passage? Intercoolers obviously have proven to substantially increase HP. Back in the day we used to put dry ice under the intakes on big block Mopars and run a cool can trying to squeeze as much power as we could out of them (at the drag strip).
