No matter what type of application you may have and no matter where on the globe it may be, the Cummins Tier 3/Stage IIIA certified engines are the choice you can depend on. Every time. Cummins uses in-cylinder technology, a simple and cost-effective solution that maintains Cummins proven performance, dependability and durability while meeting Tier 3 and Stage IIIA emissions standards, and providing the base platform to reach Tier 4 requirements as well.

QSK19
Combines advanced in-cylinder combustion technology with state-of-the-art electronic controls and Cummins modular common-rail fuel system to ensure clean, efficient performance, minimum maintenance with superior reliability and durability. Ratings from 506-700 hp (377-522 kW). In the same compact footprint as its predecessor.

QSX
The QSX combines advanced in-cylinder combustion technology and a dual overhead cam design with proven heavy-duty components for dependability without compromise, every hour of every workday. Features our patented wastegated turbo with excellent response and powerful torque rise. Ratings from 375-665 hp (280-496 kW).

QSM
Every day QSM engines are put to the test in industrial applications worldwide. With superior performance that's the result of advanced in-cylinder combustion technology and our responsive wastegated turbo. Advanced design ensures that maintenance is kept to an absolute minimum. Ratings from 290-400 hp (216-298 kW).

QSL
Every hour of every day Cummins QSL engines deliver performance that meets the challenge of a multitude of tough industrial applications worldwide. With ratings from 250-365 hp (186-272 kW) and a torque rise of up to 50%, QSL engines combine advanced in-cylinder combustion technology and a High-Pressure Common-Rail (HPCR) fuel system that increases power and reduces emissions.

QSC
Cummins QSC engines are built on one of the world's most successful - and durable - engine block designs. In fact, there are over three quarters of a million in use around the globe every day. Ratings are from 205-305 hp (153-227 kW). And there's no fuel economy penalty when compared to Tier 2 and Stage II mechanical engines.

QSB6.7
Our new QSB6.7 diesel engine makes short work of the tough jobs. Advanced electronic controls and a HPCR fuels system capable of multiple injection events per cycle keep it running quietly and efficiently. Ratings range from 133-275 hp (99-205 kW).

QSB4.5
Cummins QSB4.5, a 4.5-liter power plant incorporates similar technology and user benefits to the 6.7-liter model. Electronic controls are easily customized using Cummins PowerMatch. The QSB4.5 is rated from 110-170 hp (82-127 kW).

QSB3.3
Cummins QSB3.3 combines the proven reliability of our 3.3-liter platform with electronics and a High Pressure Common Rail (HPCR) fuel system. The result is an engine capable of 110 hp (82 kW) in a package that takes 30% less space and weight than the average 4.0- to 4.5-liter engine. It meets Tier 3 and Stage IIIA emissions without exhaust gas recirculation, operates safely on fuel with a high sulfur content, and it runs quieter and smoother with durability that's equal to any competitive engine. Ratings range from 80-110 hp (60-82 kW).

B3.3
Our B3.3 has an in-line 4-cylinder design with a compact footprint for easy installation.  With ratings from 60 hp (45kW) to 85 hp (63kW) Cummins in-cylinder solution meets Tier 3 and Stage IIIA emissions or Tier 4 Interim and Stage IIIB emissions below 75 hp (56kW) with both naturally aspirated and turbocharged versions that deliver strong performance.