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Kenworth’s 2013 PACCAR MX-13 12.9-liter engine offers a range of 380 to 500-hp and 1,450 to 1,850 lb-ft of torque. The high end horsepower and torque ratings are an increase over those previously offered for the 2010 PACCAR MX engine, which the PACCAR MX-13 replaces in 2013. The new engine is available for the Kenworth T800 and W900 typically selected by vocational customers, in addition to Kenworth’s T660, T680 and T700 aerodynamic trucks for over-the-road applications.