Using this KEIN Central Floor Brace is easy. Just install it on your 2002 - 2007 Subaru WRX or 2004 - 2007 Subaru STI as per the included instructions. When driving, you'll immediately feel the difference in handling. As for maintenance, keep it clean. If you notice any scratches on the powder - coated finish, you can touch it up to prevent rust. Also, check the attachments regularly to make sure they're tight. During installation, make sure you're working in a safe environment. If you're not confident doing it yourself, it's best to have a professional handle the installation. Enjoy the improved performance of your car with this great brace!