Using your K&N air filter is easy. First, make sure your vehicle is turned off. Then, open the factory air box and take out the old filter. Put the K&N filter in its place and close the air box. That's it! As for maintenance, every 50,000 - 100,000 miles, check the filter's condition. If it looks dirty, you can wash it with K&N's filter cleaning kit. After washing, let it dry completely and re - oil it before putting it back in the air box. Remember to always follow the instructions on the cleaning kit. Also, make sure the filter is properly installed to avoid any air leaks. This will keep your engine running smoothly and your filter working effectively for a long time.