Using your K&N air filter is easy. Just remove your old filter from the factory air box and drop in the new K&N filter. Make sure it fits snugly. When it comes to maintenance, you don't need to replace it often. But over time, it will collect dirt. You can wash it with a mild detergent and water. Let it dry completely and re - oil it before putting it back in. Keep in mind that when you clean and re - oil the filter, follow the instructions on the K&N cleaning kit. Also, make sure the air box is clean before reinstalling the filter. This will help your filter work at its best and keep your engine running smoothly.