Using the DC Sports Rear Strut Bar is simple. Just install it between the strut towers of your 2015 - 2021 Subaru WRX/STI or 2013+ Subaru FRS/BRZ as per the included instructions. Make sure all the bolts are tightened properly during installation. As for maintenance, regularly check the bar for any signs of damage or loose bolts. Clean it with a mild soap and water solution to keep it looking good. If you notice any issues, contact our customer service for further assistance.