Actually, the term "Ram Air" is grossly inaccurate. The engine rpm at any given speed creates more vacuum than the force of the incoming air. In otherwords, the air is always sucked in, not forced in. That being said, the source of the air is very important. You want air from outside of the engine compartment, as mentioned above. the real difference between most cold air kits and "ram air" kits is the path which the air follows. The straighter the path, the smoother the flow.
Take care,
-Chris
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