Emissions certification, Tier 0 versus Tier 2.
IT appears that the GP2000 was eight version of the GP59 whereas the GP68 was of the SD70 class. I don't know what would have changed betweenthe two locomotives. Gary
Are the GP68 and the EMD GP2000 the same.Both have 8 cylinder 2000 hp 710 engines and Norfolk Southern is the railroad which had an idea about ordering such a locomotive. Gary
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