Using your Noble DD2 Carbon Fiber Duckbill Spoiler is simple. It's designed to fit 2015 - 2021 Subaru WRX and STI models. When installing, find a friend to help you out. Clean the trunk area with rubbing alcohol to make sure it's clean. Wait for the alcohol to dry. Then, center the spoiler on the trunk, peel off the 3M backing, and press it down firmly. Remember, the best temperature for installation is 70 - 85 degrees. After installation, give it 72 hours for the bond to get really strong. For maintenance, just wash it gently with mild soap and water like you would the rest of your car. Avoid using harsh chemicals that could damage the gloss carbon fiber finish.