Red Bull and Ferrari have revealed very minor upgrades for the Azerbaijan Grand Prix weekend as it seeks to close the gap to runaway leaders McLaren.
The season so far has largely been dominated by McLaren, who has won 12 out of the 16 races staged.
Red Bull took its third victory of the season last time out at Monza, while Ferrari is still awaiting its first triumph of the campaign.
In an effort to bring itself into the competitive picture this weekend in Baku, Red Bull has re-profiled its inboard wing assembly to increase local load.
Ferrari, meanwhile, has enlarged its front brake duct cooling exit to improve cooling around the circuit.
Championship leaders McLaren, who can exit the Baku F1 weekend with the constructors' championship secured, have not listed any upgrades for the event.
The same approach has been mirrored at Aston Martin, Alpine, Haas, Williams and Stake.
As the F1 season enters its final third and a major regulation change coming into play next year, it is widely anticipated that the development of the current cars will be relaxed.
Mercedes has brought a minor upgrade for the weekend, listing a reduced chord front wing flap, while Racing Bulls has made alterations to its front and rear brake ducts to enhance cooling.
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