The Tunnel Run for those of you who don't know. Is not a 'race'. It is about noise rather than speed. With some help, we can map all the tunnels of the map and create a route that includes all or most of them. And have ourselves a little cruise around in the cars. Enjoying the sights and sounds of the map. Muscle/Tuner cars would be best as they offer the nicest sound of all cars in the game.