The Bearing Housing complete with both Turbine and Compressor Wheels assembled is called a Cartridge Assembly.

If either of the Wheels especially the Compressor Wheel have rubbed on the Housing and scored the outer Housing up you might consider either a completely rebuilt Turbo or a used one.

Before installing anything new it is important to find what caused the failure to begin with.

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84 300D, 82 Volvo 244Gl Diesel