Using the PERRIN Rear Shock Tower Brace is straightforward. Simply install it on your 2015 - 2021 Subaru WRX or STI as per the included instructions. When driving, you'll notice improved handling right away. As for maintenance, keep an eye on the bolts holding the feet together. Check them periodically to make sure they're tight. Clean the strut bar and feet regularly using a mild cleaner to remove dirt and debris. Avoid using harsh chemicals that could damage the powder - coated finish or the anodized black feet. If you notice any signs of wear or damage, such as cracks in the tubing or excessive corrosion, replace the brace as soon as possible to ensure your safety and the continued performance of your vehicle.