![Qsb33andqsb4 10083168](https://img.forconstructionpros.com/files/base/acbm/fcp/image/2010/02/qsb33andqsb4_10083168.png?auto=format%2Ccompress&fit=crop&h=288&q=70&w=512)
![03f34697](https://img.forconstructionpros.com/files/base/acbm/fcp/image/2024/05/03f34697.png?auto=format%2Ccompress&q=70&w=250)
The four-cylinder QSB3.3 and QSB4.5 engines will meet Tier IV Interim off-highway emissions in 2012 across a 75- to 160-hp power range.
- Retain the same 3.3- and 4.5-liter proven platforms
- Will be supplied as a fully integrated air-intake-to-exhaust system
- Will utilize cooled Exhaust Gas Recirculation (EGR) for NOx control and exhaust aftertreatment for removing over 90% of particulate matter
- Upgraded turbocharger with electronic control
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