Mack Trucks Maximizes Fuel Efficiency with FactoryInstalled FlowBelow System for Mack Anthem Mack Trucks announced the availability of a factory-installed FlowBelow Tractor AeroKit system on its Mack Anthem highway models, further improving fuel efficiency by up to 2.23 percent. The system will be available for order beginning later this quarter. Mack made the announcement during the virtual American Trucking Associations Management Conference & Exhibition....