Using this Remark axle back exhaust is simple. First, make sure your vehicle is a 2015 - 2021 Subaru STI or WRX. It directly bolts onto the OEM or Remark mid Y - pipe, so you can easily install it at home with basic tools. When installing, ensure all the gaskets and bolts are properly tightened to avoid any exhaust leaks. As for maintenance, it's a good idea to regularly check the exhaust for any signs of damage or loose parts. Since it's made of stainless steel, it's relatively resistant to rust, but if you live in an area with harsh weather or lots of road salt, you might want to clean it occasionally with a mild soap and water. Also, when you start the vehicle after installation, listen for any unusual noises which could indicate a problem. If you have any concerns, don't hesitate to consult a professional mechanic.