Using this OLM Limited Edition dry carbon fiber hood scoop cover is a breeze. First, locate the factory color - coded piece on your Subaru WRX or STI (2015 - 2021). Then, take the cover which has pre - applied 3M automotive grade double - sided adhesive. Align it carefully with the factory piece and press firmly for a minute until it's securely in place. When it comes to maintenance, use a mild car wash soap and a soft cloth to clean the cover. Avoid using abrasive materials as they might scratch the carbon fiber surface. Also, don't use harsh chemicals on it. If you notice any loose edges, you can press them down again for a better fit.