Using this Resonated Remark Mid Pipe Kit is easy. First, make sure your Subaru WRX is from 2022 to 2025. If you have a Remark axleback exhaust, simply bolt this mid pipe onto it. If you're using the OE factory axleback exhaust or rear exhaust sections, it'll fit too. When installing, ensure all connections are tight to prevent any exhaust leaks. As for maintenance, since it's made of 304 stainless steel, it's quite durable. But you should still check the welds and connections periodically for any signs of wear or damage. If you notice any issues, get it fixed right away. Remember, the Remark axleback exhaust systems are sold separately, so if you want to use them with this mid pipe, you'll need to purchase them separately.