When replacing the turbocharger, the catalytic converter, but also when revising the water pump, new gaskets are needed for the turbo.
This is about the gasket to the KAT side, made in the EU.
See also our set offer to turbocharger gaskets.
Scope of delivery:
Ring gasket Turbo to KAT
like: Opel 4812904 / GM 12618586