Downpipe designed for: BMW F90 M5Downpipe by TurboWorks, made of 100% high-grade stainless steel. Inlet diameter: 3.0 "(76mm) Outlet diameter: 3.0" (76mm) Downpipe designed for: BMW F90 M5Downpipe by TurboWorks, is made of 100% stainless steel. Inlet Diameter: 3.0 "(76mm) Outlet Diameter: 3.0" (76mm)