Using this KEIN Master Cylinder Brace is easy. First, gather basic tools like a wrench. The holes on the brace match the existing ones on the firewall of your 2005 - 2007 Subaru Legacy, so just align them and use the included installation hardware to secure it. When it comes to maintenance, since it has a durable blue powder - coated finish, you can simply clean it with a mild soap and water solution. Avoid using harsh chemicals as they may damage the coating. Check the installation periodically to make sure all the hardware is tight. Also, during extreme braking events, keep an eye on the performance, but generally, with the 2 - year warranty, you can have peace of mind.