Red Bull to use 'important' F-duct in Valencia - Vettel

Red Bull is bidding to return to dominance on the streets of Valencia next weekend by using an F-duct system.

With Red Bull earlier looking set to walk the 2010 title, McLaren crept onto the pace in Turkey and then leapt to the top of the championships with one-two victory in Canada last weekend.

Red Bull used its initial version of McLaren's downforce-stalling F-duct concept in practice for the Turkish grand prix, but then decided to develop it further rather than take it to Canada.