At the last round in Belgium Toro Rosso brought a new nose and in Monza they have tested a new front wing. It features a new small flap (see red arrow) to better direct the flow of air to the back of the car. The team evaluated the new wing on Friday but didn't opt to use it in qualifying and the race
In Monza Fernando Alonso and Felipe Massa have been using the new rear wing Ferrari introduced at the last round at Spa. But there are some differences on the Monza-spec wing (see main drawing), including different endplates with just two gills instead of three (see upper red arrow and inset) and a lower downforce main profile and flap. The beam wing (see lower red arrow) is also new. No longer straight in shape, it's wider at its centre and has a different chord. In order to produce more downforce and better preserve their tyres, Ferrari used slightly different incidence angles on the rear wing for qualifying and race compared to practice.
Mercedes are using the same rear wing they took to the last round in Belgium (see main drawing). However, to help achieve higher top speeds on Monza's long straights they have opted to use a different angle of incidence for the main plane, which now has a higher leading edge, and the flap, which is now angled much lower.
In Italy McLaren are using the same rear wing they introduced in Spa. It is a touch more angled than those found on other cars, but seems to be advantageous into and out of corners and in braking areas.
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