Using the Injen SP cold air intake is straightforward. First, make sure your engine is cool before installation. Locate the original air intake system in your INFINITI M35 and carefully remove it. Then, install the new Injen intake following the provided instructions. Connect all the tubes and hoses properly. Once installed, start your engine and check for any abnormal noises or loose connections. When it comes to maintenance, regularly inspect the Injen SuperNano - Web dry air filter. If it looks dirty, you can clean it according to the cleaning instructions that come with the filter. This will help maintain good airflow and filtration. Also, keep an eye on the intake tubes for any signs of damage or wear. If you notice any issues, contact Injen's customer service for assistance. Remember, using high - quality fuel can also contribute to the optimal performance of your engine with this intake system.