In FP1 tpday, Red Bull will test a modified version of the medium-downforce wing on Perez’s car, while Max will use an unchanged medium-downforce rear wing.
Namely, on Perez’s wing, we can notice a modification in the form of a Gurney flap, which prevents flow separation and thus improves wing efficiency. This solution could be an ideal compromise, considering the already significant performance gap Red Bull has compared to other cars.
Red Bull spring a surprise with Monza rear wing configuration (msn.com)