What does that pipe do in GT1 race cars?

when i see gt1 class race cars like the ones in the 24 hr le mans series, they have a large tube that connects to the one of the windows or to the side of the car. i just wanted to know what that tube does. if a ref pic is needed just google pagani zonda motorsport or pagani zonda gt1. thx.|||It is an air scoop directing air to brakes and coolers.