Using these OLM paint-matched lower mirror covers is easy. First, make sure your vehicle is one of the compatible models: 2015 - 2021 Subaru WRX / STI or 2016 - 2017 Subaru Crosstrek. If you have a WRX / STI, remove the stock block-off plate for puddle lights. Then, simply install the mirror covers as a pair. It's a straightforward process. When it comes to maintenance, just clean them regularly with a mild automotive cleaner to keep the gloss clear coat finish looking great. Remember, these covers are not compatible with vehicles that have puddle lights or our Subaru OEM puddle light kit, so double - check your vehicle before installation.