Using this exhaust is straightforward. First, make sure your vehicle is a 2011 - 2014 Subaru WRX or STI Sedan, as it won't fit aftermarket exhaust systems. Installation is easy since it directly bolts onto the OEM mid Y - pipe. All the necessary gaskets and bolts are included. When driving, you'll notice a more pronounced Subie sound and improved power and torque. As for maintenance, regularly check the bolts to ensure they're tight. Keep the exhaust clean to prevent rust, especially if you live in an area with a lot of road salt. Since it's made of high - quality 304 stainless steel, it's durable, but proper care will make it last even longer.