Whatever they are doing, they have a lot of people scratching heads to try to figure it out.

I have seen some good theories out there, but I'm not 100% sure if any of them would run afoul of the current regs. One if the theory of using some type of bimetal stips to channel air to different parts of the cooling ducts under different temps. I can't take this one too seriously myself, because although it might help the warm up stage, it couldn't increase flow once the tires are warmed up. And lower temps long term is what they seem to be able to do. There are also theories on the use of phase change materials in the tins areas, and that might have more potential to limit heat conduction to the wheels and tires. But even that seems unlikely, unless they are also incorporating it into the carbon fiber areas of the drum.

I wonder if the recent inspection gave any real insights to this, or if it remains very well hidden. Only time will tell.