The current model , the 4000 - horsepower MP40PH - 3C , is more powerful than their predecessors , the EMD F59PH .
The coaches are primarily hauled by MPI MPXpress series locomotives .
The current model , the 4000 - horsepower MP40PH - 3C , is more powerful than coaches ' predecessors , the EMD F59PH .
The coaches are primarily hauled by MPI MPXpress series locomotives .