Using your K&N air filter is a breeze. First, find your factory air box under the hood. Open it up, take out the old air filter, and drop in your new K&N filter. Make sure it fits snugly and close the air box. That's it! You're ready to enjoy better airflow and performance. As for maintenance, keep an eye on the filter. When it looks dirty, it's time for a cleaning. You can use K&N's air filter cleaning kit. Just follow the instructions on the kit. First, spray the cleaner on the filter, let it soak for a bit, then rinse it gently with water. Let it dry completely before oiling it with the provided oil. Be careful not to over - oil the filter. Also, always refer to your vehicle's manual for any specific instructions or warnings. With proper care, your K&N air filter will serve you well for the life of your car.