Williams FW31 - revised rear wing 26 April 2009
Perhaps surprisingly for one of the three original double-diffuser teams, Williams have taken the lead from a single-diffuser team (Red Bull) with this revision to their rear wing in Bahrain. As on the RB5, the endplates now come down to meet the outer walls of the diffuser. In doing this they have slightly reduced the total width of the diffuser's side channels.
