Rally Cross - Engine Management Tuning
During the initial Global Rally Cross event held at Irwindale Stephan Verdier passed Marcus Grunholm (former WRX rally champion) on the outside in his personal 2004 Subaru Impreza WRX STI. This vehicle was custom tuned using Motec and tuned by of course William Knose. A little more from Road and Track: http://blog.roadandtrack.com/gronholm-wins-first-global-rallycross-event/