Rooftop POV E39 M5 | Autocross

#BMW, #BMWracing, #splitter, #downforce, #aerodynamics, #M5, #E39M5, #E39540i, #E46, #E46M3, #swaybar, #unicornreins, #springrate, #autocross, #SCCA, #prosolo, #racing, #roadcourse, #arizonamotorsportspark