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The K&N high flow filters WILL give you a couple of miles to the gallon more. The engine on the intake stroke is able to suck in the Air Fuel mixture easier so less energy is lost or required thus make more energy going to the wheels. The K&N are made out of cloth, not paper and come with a 1,000,000 mile warranty. You only have to clean it once in a while. Better fuel economy and you do not have to replace the paper filter two three times a year, saving you more money. AFE is also a really good filter, but are not always available for certain cars.
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