[CMOS]

Originally Posted by Lupin..the..3rd

The fabspeed cold air kit simply eliminates the spring plate thingie, the airbox sound muffler, and replaces the factory corrugated plastic hose with a smooth silicone one. It allows the motor to breathe through the entire surface area of the air filter, all of the time.

That's what I don't get. If Porsche could get more power out of the engine by using 100% of the filter 100% of the time, wouldn't they do that? What's the trade off?