Using this exhaust is straightforward. First, make sure your vehicle is the right model (2008 - 2014 Subaru STI Hatchback or 2011 - 2014 Subaru WRX Hatchback). You can easily install it with the direct bolt - on design. Just follow the included instructions and use the provided gaskets and bolts. When it comes to maintenance, regularly check the exhaust for any signs of damage, like loose parts or rust. Since it's made of stainless steel, it's quite durable, but a quick visual inspection every few months is a good idea. Remember, it's recommended to use exhaust hangers for a better fit. If you notice any strange noises or a change in performance, it might be time to have it checked by a professional.