Using this Remark axle back exhaust is easy. First, make sure your vehicle is a 2015 - 2021 Subaru WRX or STI. It directly bolts on to the OEM or Remark mid Y - pipe, so you can install it without too much hassle. Just follow the included instructions and use the gaskets and bolts provided. When it comes to maintenance, regularly check the exhaust for any signs of damage like dents or rust. Since it's made of stainless steel, it's pretty durable, but a quick inspection every few months is a good idea. Avoid driving through deep water as it can damage the internal components. If you notice any unusual noises or performance changes, have it checked by a professional. And for the best sound and performance, consider pairing it with a Remark mid pipe as recommended.