AIR FILTER, HIGH PERFORMANCE BY K AND N
K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most mustang you simply remove the disposable air filter and replace it with a K&N. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty?