Technical Analysis: The upgrades we saw at pre-season testing

As the final day of testing came to an end, here’s a technical analysis of the new parts the teams brought ahead of the Bahrain GP, where we will see the real performances of each team.
Red Bull
The Milton Keynes-based team used a lot of flow viz on the diffuser, which was renovated even more compared to the one of the RB18, in order to better extract the air and reduce the porpoising. The rear wing also had a different shape (this can change from track to track, though). Plus, the beam wing had a different layout, too.