Downpipe 5 screws T3 / T4 to 2.5 "V-Band Material: stainless steel. Allows for a simple construction of a high-flow exhaust system. The properly selected shape of the housing allows you to accelerate the flow of exhaust gases from both the turbine outlet and the wastegate valve. V-Band assembly and disassembly is extremely simple.Downpipe 5 screws T3 / T4 to 2.5 "V-Band Material: stainless steel. Allows simple construction of a high-flow exhaust system. A properly selected shape of the housing allows to accelerate the flow of exhaust gases from both the outlet turbine and wastegate valve. Thanks to the use of the V-Band connection, assembly and disassembly is extremely simple.