[7000rpmisheaven]

A cold air kit might be mounted to take the air in a place where it is not affected by the heat of the motor. Ram air uses the force of the air moving outside of the car. The idea is that if you are cruising down the road at 70 mph, you would want to direct that 70 mph movement of air directly into your intake. The pressure it causes would cause a very slight supercharger type effect. This is obviously a cold air induction also. If you have mass air rather than speed density your motor should take well to the increased airflow.