Downpipe 5 screws T3 / T4 for 2.5 "V-Band with wastegate flap Material: cast iron / stainless steel. Allows for simple construction of a high flow exhaust system. A properly selected housing shape allows acceleration of exhaust gas flow from both the turbine outlet and the wastegate valve. Thanks to the V-Band connector, assembly and disassembly is extremely simple. Built-in wastegate flap requires only connecting the so-called pears. When installing the external WG valve, this flap can be welded. Dimensions given in the last photo in the gallery.