Using your GrimmSpeed radiator shroud is a breeze. First, make sure your vehicle is parked and the engine is cool. Find a flat and stable surface to work on. The shroud is designed for direct fitment, so simply align it with the appropriate areas on your 2015 - 2021 Subaru WRX or STI. Use the included hardware to secure it in place. It's recommended to double - check the tightness of all connections after the installation. As for maintenance, regularly inspect the shroud for any signs of damage, like scratches or chips in the powder coat. If you notice any, clean the area gently with a mild soap and water solution. Avoid using abrasive cleaners as they can damage the finish. Keep it clean to ensure optimal cooling performance. When your car is not in use for a long time, it's a good idea to cover it to protect the shroud from dust and debris.