Using these Noble Platinum dry carbon inner rear door upper trims for your 2022 - 2025 Subaru WRX is easy. First, pick a time when the weather is between 75 - 95 degrees and make sure it stays that way for at least 24 hours. The best results come after 72 hours. Before installing, clean the area where you'll put the trims. Get rid of dirt, debris, and any Armor All. Test fit the trims to see how they'll go on. Then, use the cleaner and application promotor that come with the set. Remove the backing from the double - sided adhesive on the trims, place them in position, and press firmly for 30 seconds. As for maintenance, just clean them gently with a soft cloth and a mild cleaner. Avoid using abrasive materials that could scratch the clearcoat. If you need the front trims, remember they're sold separately.