Red Bull Racing will only bring its version of the F-Duct to the Spanish Grand Prix if the team is convinced that it will deliver a performance boost to the team.
With Ferrari, Mercedes GP and Williams already beginning track testing of the McLaren-pioneered concept that helps stall the rear wing for a straight-line speed boost, Red Bull Racing has provisionally pencilled in the next race in Barcelona for trying out its version.
However, with the team already enjoying a speed advantage over its rivals and clear favourite for victory at the Spanish GP, the outfit may opt to hold back on bringing it onto the car until the Turkish GP - with the F-Duct being of no real advantage in Monaco.
Team principal Christian Horner told AUTOSPORT about his team's plans for the F-Duct: "Let's wait and see what happens.
"Like all components, we will only introduce them to the car when they have a tangible benefit. The guys are obviously working flat out on our own version, but we are not going to rush something that is under developed."
Ferrari tried out parts of the blown-wing concept on Fernando Alonso's car in Chinese GP practice, but it was not a fully working version that featured any duct from the cockpit.
Mercedes GP and Williams also tried out passive versions in China, with the teams likely to bring further evolutions in time for the Spanish GP.
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