A splitter system for a vehicle includes a splitter body having a first splitter-body side and a second splitter-body side. The vehicle includes a vehicle body arranged along a longitudinal body axis and having a first vehicle body end configured to face oncoming ambient airflow. The splitter body is mounted at the first vehicle body end to generate an aerodynamic downforce thereon when the vehicle is in motion. The splitter system has a first winglet operatively connected to a first splitter-body side and a second winglet operatively connected to a second splitter-body side, wherein the first and second winglets are configured to control movement of the ambient airflow relative to the splitter body. A mechanism is configured to selectively shift each of the winglets in a direction transverse to the longitudinal body axis, to thereby adjust the aerodynamic downforce generated by the splitter body on the first vehicle body end.