There's a big slot there probably feeding another one directly behind it?
The question is.. Is this RedBull/Sauber solution the right path?
It is essentially doing the same as the Mclaren's too.. But does it blow the exhaust more efficiently?
It is very hard to tell as geometrically I think all three are similar in some ways.
The Sauber having an exhaust ramp.
The Red Bull having an "Exhaust bridge" complete with underpass
The Mclaren having a "coanda lowerator"
The Saubeer's I think has a problem with air coming off the flanks crossing the path of the exhaust as it shoots to the rear.
The Macleran one does not need a tunnel like the RedBull as it is overhanging the undercut already.
So despite my initial surprise... The RedBull concept is not that much different.. but IS IT BETTER than Mclarens?
less fuss for the exhaust? could be..