A vehicle includes a truck bed having a front wall, a tailgate, and a pair of sidewalls that extend between the front wall and the tailgate and an airflow assembly. The airflow assembly includes air inlets, air outlets, and a tubular duct. The air inlet is provided on an exterior surface of each of the pair of sidewalls. The air outlet is provided on an interior surface of each of the pair of sidewalls. At least two air ducts fluidly couple the air inlet and the air outlet on each of the pair of sidewalls. The tubular duct extends in the vehicle lateral direction to couple the air outlets on each of the pair of sidewalls such that air exiting the air outlets enters into the tubular duct and exits the tubular duct to create an air ramp flow path.