Connector-Pipe Rdcr 4-1/2X4X6 Stl O J190041

The Donaldson Exhaust Pipe Reducer Coupling 4.5 to 4 Inch OD-ID (J190041) is a pipe adapter designed to provide a smooth transition between differing exhaust pipe diameters. It facilitates inline ducting connections by reducing pipe size while maintaining flow continuity and minimizing turbulence in heavy-duty vehicle exhaust systems.