Using this Noble exhaust is easy. First, gather all the components included in the package. Make sure your vehicle is parked on a flat and stable surface. Start by removing the old exhaust system carefully. Then, align the new exhaust with the mounting points on your Subaru WRX (2022 - 2025). Secure it tightly using the provided hardware. If you want to reduce the noise, install the included silencer. As for maintenance, regularly check the exhaust for any signs of damage or loose parts. Clean it with a mild soap and water solution to keep its titanium finish looking great. Remember, this exhaust comes with a 1 - year warranty against manufacturer defects, but avoid using harsh chemicals or abrasive tools on it, as this could damage the finish and void the warranty.