Using your Injen cold air intake is easy. First, make sure your engine is cool before installation. Carefully follow the included instructions to install the intake in your Mazda 3. Once installed, start your engine and enjoy the improved power and sound. When it comes to maintenance, check the air filter regularly. If it looks dirty, you can clean it using a filter cleaning kit. It's recommended to clean the filter every few thousand miles, but you can adjust the frequency based on your driving conditions. As for storage, if you need to remove the intake for any reason, keep it in a dry place to prevent rust and damage. Also, always refer to the Injen limited Lifetime Warranty for any concerns or issues with the product.