Watch the ironic engine bay sticker @ 0:49 then skip "street racing" to 4:40 for the fire.
"Cause of the fire was determined to be a melted brake line quick disconnect, spraying the hot brakes igniting the fluid, working its way into the engine bay. Pumping the brakes after the race fueled the fire even further. Shortly before the car stopped the fuel line melted through creating the flames to grow rapidly"
Full Vid, for educational purposes/lessons learned