Using your K&N air filter is easy. First, locate your vehicle's factory air box. Open it up and remove the old air filter. Then, simply drop the K&N filter into the air box. Make sure it fits snugly. As for maintenance, since it's washable and reusable, you can clean it when it gets dirty. Use a K&N filter cleaning kit. Wash the filter gently with the cleaner, rinse it thoroughly, and let it dry completely. Then, re - oil it using K&N filter oil. Remember to follow the instructions on the cleaning kit. Also, always check for any signs of damage regularly. If you notice any tears or holes, it might be time to replace the filter.