Using your Injen cold air intake kit is straightforward. First, make sure your vehicle is turned off and cooled down. Then, follow the included instructions for a direct - fit installation. You'll find all the necessary parts in the kit. When using your vehicle, remember that the intake is designed to keep hot air out and feed cool air to the engine, so avoid driving through deep water or areas with a lot of debris. For maintenance, check the air filter regularly. If it looks dirty, you can clean it according to the cleaning instructions in the manual. Also, make sure all the connections are tight and secure. If you notice any unusual noises or a drop in performance, it's a good idea to check the intake system. With proper use and maintenance, your Injen intake kit will serve you well for a long time.