Cummins produces first Tier 4 interim engines
Lauren Heartsill Dowdle | September 21, 2010

Cummins finished production and supply of the first EPA Tier 4 Interim and EU Stage IIB certified engines and aftertreatment for early installation by off-highway equipment customers.

The engines also received California Air Resources Board certification to enable 50-state compliance.

The QSB6.7 engine is certified to a higher power output of 300 horsepower, while the QSL9 engine increases output up to 400 horsepower. These engines are built at the Cummins Rocky Mount plant in North Carolina.

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