Cummins engines, especially the newer ones like the ISX, generally have a wider powerband than DD15 engines, allowing them to operate better at a range of operating speeds. The ISX line of Cummins ...
Peterbilt also uses the Cummins X15 in the model 589 ... The X15 debuted in 2017 as an updated version of the ISX15. The X15 ...
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