Way back before yesterday (circa late 1980's), K&N first started offering air intakes on a massive scale. Since then, many other companies have followed suite. After-market intakes are generally designed to maximize the amount of cool air taken in by the motor. The cooler the air you have, the denser the air entering the engine causing higher combustion rates. This is accomplished by removing the clunky stock intake, and sound-dampening reservoir, and replacing the system with a smooth pipe and a high performance filter on the end. As a side effect, you will receive a louder sound from the engine while accelerating due to the removal of the stock intake system. That and the fact that it's just a pipe coming off the intake of your engine.


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