Using this Invidia exhaust is straightforward. First, make sure your vehicle is a 2022 - 2025 Subaru WRX. If you have the stock downpipe, you'll need to install the separately - purchased Catback Adapter. Follow the included instructions to attach all the parts using the provided hardware and gaskets. When it comes to using the vehicle, keep in mind that at higher RPMs, you might experience some drone. As for maintenance, regularly check the exhaust tips and piping for any signs of damage or corrosion. You can clean the titanium tips with a mild cleaner to keep them looking great. And if you notice any unusual noises or performance issues, it's a good idea to have it checked by a professional.