Using your Garrett top - mount intercooler is straightforward. First, make sure your Subaru WRX is turned off and cooled down. When installing, follow the steps carefully as it may require trimming the engine cover and could contact the clutch slave cylinder. Once installed, your vehicle should experience better performance right away. As for maintenance, regularly check the intercooler for any signs of damage like leaks or bent fins. Clean it gently with a soft brush and mild detergent if it gets dirty. If you notice any issues with performance or temperature regulation, have it inspected by a professional. Keep in mind that this intercooler is designed for 2015 - 2021 Subaru WRX models, so make sure it's the right fit for your vehicle.