The Tier3 and Stage IIIA Cummins QSB6.7 takes you to a whole new level of power, versatility and emissions control. It achieves Tier 3 and Stage IIIA compliance with in-cylinder technology that maintains a compact and simple installation that provides premium performance to every construction application.

This new 6.7-liter diesel is ready to handle your toughest job. It offers major enhancements that make every piece of construction equipment work harder, smarter, quieter and longer.

The QSB6.7 is based on the highly successful B Series engines with charge air cooling and turbocharging for strong performance, and offers power ratings from 133-275 hp (99-205 kW).

This engine combines proven full-authority electronic controls with the impressive reliability and durability and long maintenance intervals you expect from one of the world’s most successful and durable engine designs.

The QSB6.7 offers a wide range of standard features. Every QSB has improved cold-start capability and is five to nine decibels quieter in operation than its predecessor. 

To ensure that every QSB6.7 is perfectly matched to every piece of equipment, Cummins PowerMatch and Advisor are ready to provide expert assistance with your spec’ing and installation process.

Every QSB6.7 engine is covered by Cummins’ three-step warranty, one of the most comprehensive and simplest plans in the industry.