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Each power driving car (designated as DR2900s or DR3000s) is equipped with a Cummins NT855-R4 diesel engine producing 310 horsepower (230 kW) to move the train. The trailer (designated as DR2950s or DR3070s) has a diesel engine to provide head-end power for the entire three-car set. Each power driving car only has a cab at one end and two power driving cars bracket a trailer in a standard set. The standard train formation is DR2900/3000 + DR2950/3070 + DR2900/3000.
The body of DR2900/DR3000 series is also made of stainless steel, but there are only 5 longitudinal elevations along the outer wall. The air condition facilities are set at the roof to have more seats. There are doors at both ends of the trailer. In 2009 the doors are modified to automatic doors, and destination indicator was also refurbished.