Using these mirror covers is easy. First, make sure your Subaru WRX or STi is from 2015 - 2021 and has turn signals on the mirror. Remove the old mirror covers carefully. Then, simply place these new carbon fiber mirror covers in the same position. For the best fit, ensure the turn signal cutouts align properly. When it comes to maintenance, clean them regularly with a soft cloth and a mild cleaner. Avoid using abrasive materials that could scratch the glossy carbon fiber finish. If you need to remove them for any reason, do it gently to prevent damage. These covers are designed to last, but proper care will keep them looking great for a long time.