Using your K&N universal air filter is easy. First, find the right spot in your equipment where the air intake is. Make sure to clean the area before installation. Attach the filter to the intake using the rubber flange. You can stretch the flange a bit if it needs to fit a non - standard size. When it comes to maintenance, check the filter regularly for dirt and debris. If it looks dirty, it's time to clean it. Wash the filter with a mild soap and water, then let it dry completely. Don't use harsh chemicals as they may damage the filter. Once dry, you can reuse it. Always keep the filter dry during storage to prevent mold or mildew growth.