Navistar at the NTEA's 2013 Work Truck Show

David Majors, Navistar's VP-product development, showing off the new 4x4 version of the International TerraStar medium-duty truck.

A WorkStar dump truck equipped with a 350-hp MaxxForce 10 engine.

A silver WorkStar equipped with a 475-hp MaxxForce 13 engine.

A MaxxForce 13L engine in the foreground with a MaxxForce DT model to the rear.

A DuraStar equipped with an aerial bucket arm featuring a 245-hp MaxxForce DT engine. Slightly obscured behind it is a bronze crew cab version of the DuraStar, which sports a MaxxForce 7 engine.