The Tier 3/Stage IIIA QSB6.7 engine is one of the Quantum Series of rail engines from Cummins with innovative technology that delivers more for less. The QSB6.7 has more power, more torque and higher durability – all while achieving lower fuel consumption, lower emissions and less servicing. Using the Cummins PowerMatch tool set, it is possible to custom-tailor the engine torque curves and calibration features tothe specific operation of the equipment. This means higher productivity and fuel efficiency benefits for the rail operator.