Using the AEM cold air intake is easy. Just install it according to the included instructions in your 2022 - 2025 Subaru WRX. Make sure all connections are secure. When driving, you'll notice improved engine performance right away. As for maintenance, check the air filter regularly. Although it can last up to 100,000 miles before cleaning, dirty driving conditions may require more frequent checks. When it's time to clean the filter, simply wash it with water and let it dry completely before reinstalling. Keep the intake system away from sharp objects to avoid damage. If you have any issues, refer to the AEM Lifetime Limited Warranty for support.