McLaren realised even before the season started that it had dropped the ball on its MCL60 concept and changed its floor philosophy for April's Baku round, which set a new development baseline rather than delivering an immediate performance improvement.
The raft of upgrades McLaren is introducing over the three July rounds represents the first true upgrade push for the season, which the Woking squad hopes will push it towards the front of the midfield after scoring just 17 points so far.
The team is spreading its updates out across the Austrian, British and Hungarian rounds, fast-tracking one set of upgrades to the Red Bull Ring on Lando Norris' car.
On Friday the team unveiled its first round of changes, which include a fully redesigned floor, sidepod and engine cover.
McLaren said it brought a "fully revised floor" which "features updated fences, floor edge as well as diffuser shape."
The floor inevitably interacts with the rest of the bodywork, which means McLaren has also redesigned the sidepod and engine cover to improve flow conditioning to the floor and increase aerodynamic load.
It also updated its car's mirrors and halo fairing to further optimise the airflow to the rear of the car. The updated engine cover shape comes with a geometry tweak for its cooling louvres.
Source: Autosport