Give your 2018 - 2023 5.0L Mustang GT the signature ROUSH Performance sound, powerful looks, and boosted performance with this ROUSH Performance Cat - Back exhaust system. This 2018 - 2023 ROUSH Performance Cat - Back exhaust system is constructed of corrosion - resistant 304 stainless steel and is mandrel bent for high - performing airflow. Thanks to hours of RampD, testing, and validation, this ROUSH Performance Cat - Back exhaust system improves flow and reduces back pressure in your Mustang's exhaust system. Along with polished 304 stainless steel tips, this system includes a mandrel - bent x - pipe, mid - pipes, and dual high flow mufflers that improve the sound, performance, and flow characteristics of the Mustang's V8 powerhouse. ROUSH Performance recommends checking your local noise ordinances levels prior to purchase.