Using this exhaust system is straightforward. First, make sure your vehicle is a 2015 - 2021 Subaru WRX or STI. The 3 - piece bolt - on design allows you to easily install it on your car. When installing, ensure all bolts are tightened properly to avoid any leaks. As for maintenance, regularly check the exhaust for any signs of damage or loose parts. Since it's made of T304 stainless steel, it's quite durable, but in areas with harsh weather or road conditions, it's a good idea to clean it occasionally with a mild stainless - steel cleaner. Also, pay attention to the sound of the exhaust. If there's any abnormal noise, it might indicate an issue that needs to be addressed.