Using your APR GTC - 300 rear wing is straightforward. First, make sure your Subaru STI is from 2015 to 2021, as this wing is designed specifically for these models. When installing, note that while it covers the factory mounting provisions on the trunk lid, you'll need to drill some extra holes. Take your time during this process to ensure accurate installation. As for maintenance, the flat black powder - coated aluminum pedestals are quite resistant to the elements, but it's a good idea to wash them regularly with a mild soap and water to keep them looking good. The carbon fiber wing itself is durable, but avoid using abrasive cleaners on it. If you notice any signs of damage, such as cracks in the carbon fiber or loose parts on the pedestals, have it checked by a professional right away.