K&N High Flow Air Filter 2004-2005 WRX / 2004 STI / 2004-2007 FXT

K&Ns 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 this vehicles you simply remove the disposable air filter and replace it with a K&N. K&N stock replacement air filters for street vehicles are covered by the famous K&N Million-Mile Limited Warranty and will be THE LAST AIR FILTER YOUR VEHICLE WILL EVER NEED!