DL turbo nozzeles

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Hi
I would like to know the right nozzeles to fit into my eng.DL turbo 2.800. FRom these nozzeles whatis the exact one;
1)DN12SD12A.
2)DN12SDND214
3)ND12SDND136 ???
PLease help I have to start the job I,ll replace them and the pistons too that,s because of over heating
I,ll right the story after we finish the job.
thanks
Makhyuon