These reusable K&N Filtercharger air filters outflow any other filter--up to 900 cfm--for power gains of up to 15 HP. They use a surgical cotton fabric soaked in oil as their tack barrier. Sandwiched between an aluminum screen wire, the holes in the cotton catch tumbling air and straighten it out. Since air moving in a straight line flows faster, the filter actually improves airflow. They can be covered by up to 1/4 in. of debris before air restriction makes cleaning necessary. The filters come pre-oiled, and many are available as a direct fit for your application.
A high-flow, washable filter that delivers the maximum amount of air possible into your engine while providing superior filtering
Multiple layers of cotton fabric sandwiched between pleated aluminum screen capture airborne dirt particles
Improves horsepower and torque
Emission legal in all 50 states, will not void manufacturer's warranty
Filters can be cleaned over and over, and are backed by a million mile limited warranty
review by a car ignoramus I know nothing about cars. Okay, very little about cars. But this looked a darn sight more sturdy than the one I took out, and I didn't have any trouble figuring out how to put it in. So as far as I'm concerned, this gets a thumbs up. I haven't yet tried to clean and reuse it....more info