Verus Engineering Splitter Air Dam KitThe Verus Engineering WRX STI Air Dam is a simple bolt on addition that improves front splitter performance and makes any front splitter a more complete system. Ensuring high pressure air cannot make its way between the front splitter and the bumper, increases the pressure differential on the splitter, improving performance. By improving the airflow around the front bumper, other items, like our dive planes, also see an improvement in performance. The