Ahead of the Spanish GP week end I found these cool animations, one showing details of Mclaren's rear suspension, a three shock arrangement with two torsion bars and a central spring allowing precise control over roll and pitch, essential for traction.
The second clip shows Renault's innovative "double" rear diffuser. The videos are in Italian but the pictures are clear enough to get an idea. Renault cleverly moved the lower slits forward but cover them with a box structure which allows them to fall within the regulation parameters.
(Gazzetta Dello Sport)
end of post