Using your Injen cold air intake is straightforward. First, make sure your engine is cool before installation. Follow the included instructions carefully to install the intake in your Audi. Once installed, start your engine and enjoy the improved performance and sound. When it comes to maintenance, regularly check the Injen SuperNano - Web dry air filter. You can clean it according to the instructions provided. This will ensure that it continues to provide great airflow and filtration. Also, keep an eye on the intake tube for any signs of damage or loose connections. If you notice anything unusual, contact Injen's customer service. Remember, this intake is designed for specific Audi models, so don't try to use it on other vehicles. With proper use and maintenance, your Injen cold air intake will serve you well for a long time.