Machined steel 4.62″ flange (S400 flat V) for your S400 turbo. Most Borg Warner S400 T4 turbine housings utilize this style exhaust outlet flange. It has a machined recess to accept a 4″ pipe. Includes heavy-duty quick-release v-band clamp. The flange can be purchased separately without clamp NOTE: Clamp included is a VERY heavy-duty clamp. It is not just your standard cheap clamp that breaks the first time you try to take it off!