The new Cummins QSB3.3 doesn’t just contradict conventional thinking about compact power – it rewrites the rules. The QSB3.3 delivers up to 110 horsepower (82 kW) in a much smaller and lighter package than any 4.0- to 4.5-liter engine. Plus, it has the inherent durability you’ve come to expect from larger Cummins engines.

Cummins QSB3.3 doesn't just contradict conventional thinking about compact power - it rewrites the rules. The QSB3.3 delivers up to 110 horsepower (82 kW) in a much smaller and lighter package than any comparable 4.0- to 4.5-liter engine. Plus, it has the inherent durability you've come to expect from larger Cummins engines.

Cummins next generation 4-cylinder QSB3.3 engine will meet U.S. EPA Tier 4 Interim and EU Stage IIIB off-highway low emission standards in 2012 with our proven, award winning 3.3-liter engine platform with a fully integrated system from air-intake to exhaust aftertreatment. The QSB3.3 achieves these very low emission standards by using our proven cooled Exhaust Gas Recirculation (EGR) and Cummins Particulate Aftertreatment.  Both systems have been specifically developed to maintain the compact design of the QSB3.3 ensuring the most space efficient installation.

Cummins next generation 4-cylinder QSB3.3 engine meets U.S. EPA Tier 4 Interim and EU Stage IIIB off-highway low emission standards in 2012 with our proven, award winning 3.3-liter engine platform with a fully integrated system from air-intake to exhaust aftertreatment. The QSB3.3 achieves these very low emission standards by using our proven cooled Exhaust Gas Recirculation (EGR) and Cummins Particulate Aftertreatment.  Both systems have been specifically developed to maintain the compact design of the QSB3.3 ensuring the most space efficient installation.

Cummins next generation 4-cylinder QSB3.3 engine will meet U.S. EPA Tier 4 Interim and EU Stage IIIB off-highway low emission standards in 2012 with our proven, award winning 3.3-liter engine platform with a fully integrated system from air-intake to exhaust aftertreatment. The QSB3.3 achieves these very low emission standards by using our proven cooled Exhaust Gas Recirculation (EGR) and Cummins Particulate Aftertreatment.  Both systems have been specifically developed to maintain the compact design of the QSB3.3 ensuring the most space efficient installation.

The Cummins QSB4.5 achieves Tier 3 and Stage IIIA compliance with in-cylinder technology that maintains a compact, simple installation that provides premium performance to every application. The QSB4.5 makes every piece of farm equipment work harder, smarter, quieter and longer. Every time. It shares technology with the rest of our highly successful B Series, including charge air cooling and turbocharging for strong performance. Power ratings range from 110-170 hp (82-127 kW).

The Cummins QSB4.5 achieves Tier 3 and Stage IIIA compliance with in-cylinder technology that maintains a compact, simple installation that provides premium performance to every application. The QSB4.5 makes every piece of construction equipment work harder, smarter, quieter and longer. Every time. It shares technology with the rest of our highly successful B Series, including charge air cooling and turbocharging for strong performance. Power ratings range from 110-170 hp (82-127 kW).

Built To Overachieve. The 4-cylinder QSB4.5 for Tier 4 Final is more powerful and responsive than ever before, delivering up to 173 hp (129 kW), with a peak torque of 520 lb-ft (705 N•m), a 12 percent increase over that of the previous Tier 4 Interim engine. The Tier 4 Final QSB4.5 shares a similar Cummins VGT Turbocharger, an HPCR fuel system and an ECM with the Cummins QSB6.7 engine. It is not surprising that the QSB4.5's power output is comparable in performance to that of many 6-cylinder engines below 174 hp (130 kW), from a much smaller and lighter package.

Cummins next generation 4-cylinder QSB4.5 engine will meet U.S. EPA Tier 4 Interim and EU Stage IIIB off-highway low emission regulations in 2012 with our proven 4.5-liter engine platform and a fully integrated system from air-intake to exhaust aftertreatment.

Cummins next generation 4-cylinder QSB4.5 engine will meet U.S. EPA Tier 4 Interim and EU Stage IIIB off-highway low emission regulations in 2012 with our proven 4.5-liter engine platform and a fully integrated system from air-intake to exhaust aftertreatment.