Red Bull Racing will protest rival Brawn GP over the design of its diffuser, according to reports. Questions over the design of the diffusers have surfaced since Williams and Toyota appeared to exploit the wording of the regulations to allow themselves a taller design than the rules originally intended.

Brawn GP’s new car features a unique twin-deck concept and has dominated pre-season testing times. With the matter still not settled, and talk of a possible protest having surfaced in recent days, Red Bull’s advisor Helmut Marko has now confirmed his team will object to the design if it remains unchanged and given the all-clear by scrutineers.

FIA president Max Mosley revealed earlier this week that he expected the matter to reach a head in Australia, having received complaints from at least one team about the diffuser design. Brawn GP was unavailable for comment on Tuesday night in Melbourne, but Rubens Barrichello told Gazzetta dello Sport that he was unmoved by the controversy about the team’s diffuser.