Using your K&N drop - in air filter is easy. First, locate your vehicle's factory air box. Open it up, remove the old air filter, and place the K&N filter in its spot. Make sure it fits snugly. When it comes to maintenance, check the filter regularly, especially if you drive in dusty conditions. If it looks dirty, it's time to clean it. To clean, use a K&N filter cleaning kit. First, spray the cleaner on the filter and let it soak for a few minutes. Then, rinse it gently with water until the water runs clear. Let it dry completely before oiling it with the K&N filter oil. Apply the oil evenly across the filter. Avoid over - oiling as it can damage your engine. Always refer to your vehicle's manual for any specific instructions and if you have any concerns, contact K&N's customer service.