Using your K&N air filter is a breeze. First, locate your vehicle's factory air box. Open it up and carefully remove the old air filter. Then, place the K&N drop - in filter in the same spot where the old one was. Make sure it fits snugly and close the air box. That's it! As for maintenance, keep an eye on how dirty the filter gets. When it looks really dirty, it's time to clean it. Wash the filter gently with a mild soap and water solution. Rinse it thoroughly and let it dry completely. Once dry, re - oil the filter according to the instructions on the K&N oil bottle. Remember, don't use any harsh chemicals on the filter as it can damage the media. Also, make sure to check the fit of the filter after cleaning and installation to ensure proper performance.