In Malaysia a metal joint was placed in the centre of the slotted tab to secure its stiffness . Excessive vibrations of an element ruins its aerodynamic or mechanic effectiveness and can even cause it to crack in some occasions .
The diffuser was again revised in Australia despite the latest upgrade at Barcelona test , having now a new slotted tab under the crash structure to let air bleed through . The pioneer of the slotted tab feature is credited to Toro Rosso and Renault is another team ( along with Red Bull and Mc Laren ) to copy this idea .
The floor and nose vanes revisions forced the team to alter also the diffuser by lowering the outer channels proving once again that there is a vital connection between diffuser and car front end. Another change took also place to the rear beam wing which now has a taller arched centre zone to improve downforce production . Lastly the tab under the rear structure lost its cut ( all changes in yellow ) .