Roush 15-26 Ford Mustang EcoBoost 2.3L Y-PipeROUSH Performance's Resonator Delete Y Pipe is a quick and affordable way to eliminate your factory resonator to get deep, aggressive and race inspired sound. Our Y Pipe increases flow through your 2015 2023 Mustang I4 exhaust system for maximum horsepower and torque. The 2. 5 inch Y Pipe assembly is made from high grade mandrel bent 304 stainless steel to ensure maximum flow with less back pressure and long lasting durability. The system is designed