ROUSH Performance's Resonator Delete H - Pipe is an affordable way to eliminate the factory resonator to get deep, aggressive and race - inspired sound. The H - Pipe increases flow through any 2015 - 2023 Mustang GT exhaust system for maximum horsepower and torque. Replacing your factory resonator with the ROUSH Resonator Delete H - Pipe won't trigger any check engine lights. The Resonator Delete H - Pipe is a quick and easy way to give your Mustang that deep aggressive exhaust tone and performance that can be used on the road or track. The 2.5 - inch H - 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 a perfect fit.