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OPEN AIR BOX COVER w/ K&N Filter P#E2993


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New to the club. Wondering I drive a 2014 Ford Focus SE standard 5 speed. I bought a K&N air filter replacement P#E2993. I was curious on how the car would run with the Air Box cover off. I noticed a immediate different as far as acceleration. As adds a pretty aggressive sound from the engine bay. I was just wondering if there are any down sides to this.

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Possible heat soak from then engine meaning more fuel consumption and slight loss in overall power, basically you want the air to be as cold as possible. Cold air is more dense and it burns a lot better.

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