Downpipe designed for: Nissan 350ZDownpipe by TurboWorks, is made of 100% high-grade stainless steel. Inlet diameter: 57mm Outlet diameter: 57mm The downpipe is designed for: Nissan 350ZDownpipe by TurboWorks, is made of 100% stainless steel. Inlet diameter: 57mm. Outlet diameter: 57mm