For over 35 years, the Original K&N High-Flow Air Filter continues to set the standard by which all other air filters are measured. Once an insider product known only to racing and performance enthusiasts, today our High-Flow Air Filter is seen by consumers of all types as simply The World's Best Air Filter. K&N's air filters contain 4 to 6 layers of cotton gauze, which in tandem with our oil is sufficient to provide outstanding filtration and low restriction.
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