Better Performance. Where You Need it Most. Whether you are manufacturing a large excavator, wheel loader, grader, rock drill or compressor, the QSX15 is engineered to deliver the economical, reliable power and performance that you expect from a Cummins engine. In fact, the QSX15 for Tier 4 Final offers ratings that are capable of achieving over a 50 percent increase in torque while at the same time getting better fuel economy.

The QSX15 for 2011 incorporates Cummins proven technology enablers to meet EPA Tier 4 Interim and EU Stage IIIB low emissions standard.  With ratings from 400 – 600 hp (298 - 447 kW), the QSX15 will achieve up to 5 percent better fuel efficiency*, lowering your cost of operation and improving your bottom line.

American ingenuity and over 30 years of continuous improvement have made the Cummins B6.7 a standard in reliability and performance for motorhomes and thousands of other applications, from RAM trucks to minehunters serving our armed forces. Because they provide higher confidence, performance and reliability, you deserve a diesel. Confidence.

The QSX15 for 2011 incorporates Cummins proven technology enablers to meet EPA Tier 4 Interim and EU Stage IIIB low emissions standard.  With ratings from 400 – 600 hp (298 - 447 kW), the QSX15 will achieve up to 5 percent better fuel efficiency*, lowering your cost of operation and improving your bottom line.

SmartEfficiency: High-Achieving and Cost-Lowering The Cummins SmartEfficiency initiative is a focused approach that improves uptime and reliability while providing a broad spectrum of engine choices to meet every need. The combination of a low cost of operation, high reliability, clean operation and long-term durability are unsurpassed in the industry. The fact that all Cummins engines use the same control system technology and can be serviced at any authorized Cummins location ensures serviceability anywhere, anytime