Cummins Inc.

QSB3.3 and QSB4.5 Engines

The four-cylinder QSB3.3 and QSB4.5 engines will meet TierĀ 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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