Using the fender reinforcement brace is straightforward. First, find the door hinge and inner fender on your 2008 - 2014 Subaru WRX or STI. Carefully mount the brace in place as it's designed to fit there. Make sure all the connections are secure. When driving, you'll notice improved handling right away. As for maintenance, keep an eye on the powder - coated finish. If you see any scratches or chips, it's a good idea to touch them up to prevent rust. There's no need to take it to a professional for regular maintenance; just a simple visual check every few months will do. Also, if you drive on rough roads or tracks often, check the connections more frequently to ensure they're still tight. And remember, the brace comes with a 2 - year warranty, so if you have any problems during this time, reach out to us.