Using your MBRP cat - back exhaust is straightforward. First, follow the installation guide carefully to bolt it onto your 2022 - 2025 Subaru WRX. Once installed, you can immediately enjoy the enhanced power and the aggressive exhaust sound. As for maintenance, regularly check the exhaust system for any signs of damage or loose bolts, especially after driving on rough roads. Keep it clean by washing it with mild soap and water. In extreme climates with snow and salt, it's a good idea to rinse the exhaust more frequently to prevent corrosion. Remember, this product comes with a lifetime manufacturer warranty, so if you have any issues, don't hesitate to contact the manufacturer.