The blown exhaust clampdown, taking effect this weekend at Silverstone, could blow the wind out of Red Bull's sails.
That is the suspicion of Nick Heidfeld, who admits to wondering why the team's management has been so publicly outspoken in its criticism of the FIA's mid-season move.
"Maybe they suddenly found that they will lose more than they thought at first," the Renault driver is quoted by Auto Motor und Sport.
The German report said Red Bull, as well as its engine supplier Renault, have fought tooth and nail with the governing body over the issue, arguing until mere hours ago about just how comprehensive the FIA clampdown should be.
Ferrari's Fernando Alonso sounds more resigned than Heidfeld.
"I do not expect much, really," the Spaniard is quoted by Diario Sport. "They (Red Bull) have a very elaborate the efficient package that will go well on all tracks and in all conditions."