Downpipe designed for: BMW F22 F30 F32 N55 Downpipe by TurboWorks, is made of 100% stainless steel. Inlet diameter: 95mm Outlet diameter: 76mm Outer diameter - 100 mm Downpipe designed for: BMW F22 F30 F32 N55 Downpipe by TurboWorks, made of 100% stainless steel. Inlet diameter: 95mm Outlet diameter: 76mm