Porsche Motorsports and Falken Tires released these videos promoting their updated 911 GT3 RSR for the 2012 American Le Mans Series. In the first video, the head of Porsche Motorsports details the upgrades made to the car:

They also released this pretty cool first person point of view video of one of their pit stops from the race in Long Beach. You’ll notice that these stops are little different from Formula 1. The guys are not allowed to change the tires on the car until the refueling is complete. At the end, you get a good look at the refueling hose. The fitting has two equal size ports in it because one pumps fuel in and the other pumps an equal mass of air out of the tank. That way you don’t get the gurgling effect of air bubbles trying to leave in the same space as the liquid fuel going into the tank.

Source: Falken Tire YouTube Channel