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QSB6.7 (Tier 4 Final/Stage IV)

Cummins Inc.

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Cummins Inc. - QSB6.7 (Tier 4 Final/Stage IV) Diesel Engines

For U.S. Environmental Protection Agency (EPA) Tier 4 Final and EU Stage IV near-zero emissions regulations taking effect in 2014, Cummins has a technology solution with clear advantages for every type of equipment. While other manufacturers outsource their emissions aftertreatment systems, Cummins manufactures our own. This total integration of the engine and the exhaust system allows us to optimize fuel economy above the 5 percent we’ve already achieved with Tier 4 Interim engines, while achieving near-zero emissions at the same time.

QSB6.7 engines range from 146-310 hp (109-231 kW) for Tier 4 Final. They have the same heat rejection as the Tier 4 Interim engines, so there is minimal, if any, impact on the cooling package. The QSB6.7 is one of the most popular and versatile engines ever built by Cummins.


Key Specifications
Certification Level Tier 4 Final / Stage IV
Power 146 - 310 hp / 109 - 231 kW
Torque 760 lb-ft / 1030 N•m

Company Info

Box 3005
Columbus, IN
US, 47202-3005


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