ROUSH Performance's Resonator Delete X - Pipe is an affordable way to eliminate your factory resonator to get amazing race - inspired sound. Our X - Pipe increases flow through your 2015 - 2023 Mustang GT exhaust system, including Ford's factory active exhaust, for maximum horsepower and torque.The Resonator Delete X - Pipe is a quick and easy way to improve the sound and performance of your 2015 - 2023 Mustang on the road.The 2.5 - inch X - Pipe assembly is made from high - grade mandrel - bent stainless steel to ensure maximum flow with less back pressure and long - lasting durability. The system is designed and engineered using OEM vehicle CAD data to ensure perfect fit.