Vehicle header module

The module has a flow guiding device arranged at a lower side (102.2) of a carriage body (102) between a free vehicle end (101.1) and a leading end of a chassis section (106) of the carriage body. The device influences airflow moving through the lower side of the body from the free vehicle end to the chassis section. The device imposes a downwardly directed main flow direction towards the airflow in a region of a flow break-away edge (107) at the leading end by a deflection region (110), where the main flow direction is inclined to a vehicle longitudinal direction about 6 degrees.