ROUSH 421837 2015-2017 Mustang 3.7 Liter V6 and 2.3 Liter Ecoboost Exhaust Kit Fits 2015-2017 Mustang 3.7L V6 & 2.3L EcoBoost Made from T-304 stainless steel with full mandrel bending Features 4.0" flash-chromed dual wall tips Uses OEM hangers and mounting points; No welding required Installation hardware and instructions included