X15 diesels showed quick throttle response and strong acceleration on the TRC's tracks. Engine brakes were impressively strong, even at low rpm's. A parade of X15-powered tractor-trailers led the ...
Cummins Product Manager Kyle Richardson explains the changes coming to the 2027 X15 with the aftertreatment system and the engine itself to meet new EPA 2027 NOx requirements.
Three failed 5th-gen Cummins engines were torn down, and the same core problem kept surfacing – just in different forms.
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