In theory any shop that rebuilds Fuel Injection Pumps ought to be able to rebuild your Injectors.

The question is if it turns out your Injector Nozzles are worn out do you want the Bosch made in India Nozzles or the Monark Nozzles to replace the old ones?

Unless you supply the Nozzles a bosch shop is going to replace them with bosch nozzles.

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84 300D, 82 Volvo 244Gl Diesel