Downpipe designed for: BMW M2 F87 CAT 200 cell BMW F22 CAT 200 cell BMW F23 CAT 200 cell Downpipe by TurboWorks, made of 100% stainless steel. Inlet diameter: 118mm (outside of the flange), 92 (inside) Outlet diameter: 76mm (3 ") Downpipe intended for: BMW M2 F87 CAT 200 cell BMW F22 CAT 200 cell BMW F23 CAT 200 cellDownpipe by TurboWorks, made of 100% stainless steel. Inlet diameter: 118mm (outside flange) Outlet diameter: 76mm (3 ")