On the N/A's, the air filters sit directly over the engine. So even though you bring in cooler air (via plastic tubes which can collect engine heat), the air still goes through the air filters which can "cook" the air before hitting the throttle body. With the Needswings setup, the filter is in front of the radiator. When the car is moving, the air will be cooler. Also, if you get a thermal coated intake, it will resist heat even more before it gets to the throttle body.