Using your K&N universal air filter is easy. First, find the right spot in your equipment's air intake system and attach the filter using the pliable rubber flange. Make sure it's securely in place. When it comes to maintenance, keep an eye on the filter's dirt level. Once it looks dirty, it's time to clean it. To clean, remove the filter from your equipment. Use a K&N filter cleaning kit and follow the instructions on the kit. Rinse the filter gently with water, let it dry completely, and then re - oil it according to the kit's guidelines. After that, you can put the filter back in your equipment. Note that the rubber flange can stretch a bit, but don't over - stretch it to avoid damage. Also, always make sure the filter is completely dry before re - installing it to prevent any moisture - related issues in your equipment.