Using the Noble ABS Single Exit Exhaust Cover is quite easy. First, make sure your vehicle is a 2015 - 2021 Subaru WRX or STI. Then, choose the left or right side cover according to your need. You can install it simply on your single - exit exhaust. When installing, take your time to ensure it fits well. As for maintenance, just clean it regularly with a mild soap and water solution. Avoid using harsh chemicals as they may damage the ABS material. If you find any problems within one year, you can contact the manufacturer as it comes with a 1 - year warranty against manufacturer defects.