Article from Italian webpage.
The Ferrari SF71H seen at the technical checks did not present major technical innovations compared to the victorious one in Australia. During the free practice in Melbourne, comparative tests were carried out with a version of the front wing very similar to that of last year. After analyzing the data the version of the wing brought to the track in Australia has been abandoned in the return to use the "classic" mounted on the SF71H since the day of the presentation. Wing that is easily recognizable because of the presence of a double blowing that the Italian team has inserted on the mainplane and for the upper flaps that are anchored to the large flow diverter positioned on the leading edge of the main profile.
In the rear area, on the other hand, the modification in the outside area of the diffuser brought to the track in Australia was confirmed, which is different than the previous version due to the presence of a small transversal profile that joins the external part of the diffuser. This were the changes that both drivers also confirmed for the qualification and the race.
Compared to the Australian version, the Maranello team has made a small change to the central channel that, in the version seen today in the pits, seems to have a more squared shape compared to the previous version.
A solution that guarantees a better stability in the generated load, losing theoretically in expansion (to be evaluated, on the other hand, a possible slight increase in the rake angle).
http://www.f1analisitecnica.com/2018/04 ... e-una.html