The Navistar International ProStar+ has improved aerodynamics and a nearly 1,300-lb. weight reduction from previous ProStar models. The truck is powered by the Advanced EGR MaxxForce 11 or MaxxForce 13 engine. The ProStar+ has a re-engineered overhead console. Cab noise has been reduced 9 percent compared to last year’s ProStar. Other improvements include a 20-lb. force reduction in clutch feel, providing easier shifting and less fatigue, the company says. New aerodynamic enhancements include optional full-length chassis skirts for sleepers as well as a new cab roof air fairing for day cab models. ProStar+ also includes a clutched air compressor, variable speed fan, low viscosity engine oil and fuel-efficient rear axle lubricant.