Red Bull will not have an F-duct on its 2010 car at next weekend’s Spanish grand prix.
While admitting the Milton Keynes-based team is working on the McLaren-pioneered downforce-stalling innovation, driver Mark Webber told the BBC that it is still in development.
Red Bull boss Christian Horner said before leaving China amid the volcano-induced traffic chaos that the RB6 could be equipped with a F-duct in Barcelona "providing we make it back to Europe" quickly.
Ultimately, the ash cloud subsided and teams have not been overly delayed in preparation for the first European race of 2010.
But Australian Webber said on Friday: "As soon as possible would be nice, but it’s not going to be Barcelona, that’s for sure.
"We don’t know when we’re going to have it, but we are looking at something, as I’m sure all teams are," he added.