Cummins QSL9 engine is Tier 4 Final

Cummins Inc. says its new QSL9 engine, with up to 400-horsepower output, is ready to meet 2014 EPA Tier 4 Final near-zero emissions standards with a next-generation compact catalyst and selective catalytic reduction (CCC-SCR) aftertreatment system. The company says the engine makes no performance compromises in order to meet the standard, retaining its proven fast engine response and reliability. The compact aftertreatment system provides a fully passive, flow-through operation and enables the engine to further improve fuel efficiency up to 3 percent over the current engine.