There is also a thread or 2 on fake Bosch Injector Nozzles.

Back around 1990 I bought some VW Rabbit Disel Injector Nozzles from a Bosch Certified Fuel Injection Shop (this was before the flood of Chinese fuel injection parts were available). They were made in Brazil and preformed and lasted as well as the German or French Bosch Nozzles.
As it turns out Brazil made their own VWs.

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84 300D, 82 Volvo 244Gl Diesel