Reb Bull and Ferrari has reportedly 'lodged complaints' to the FIA about a 'suspicious' feature on the McLaren cars during the Italian Grand Prix.
Sunday's Italian GP ended in a home victory for Ferrari, their risky strategy of only pitting once paying off for Charles Leclerc.
McLaren duo Lando Norris and Oscar Piastri finished second and third respectively, but footage of the race has alerted some of their rivals to a potential issue.
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According to The Mirror, Ferrari and Red Bull have raised concerns with the FIA about the legality of the front wings used on the McLaren cars in Monza.
Suspicions were allegedly raised when footage from a camera onboard Norris' car during Friday practice showed the front wing shaking when the car was travelling at high speed.
There are regulations about how much bodywork movement is allowed, as more flexibility is beneficial to performance as is helps to add balance when at different parts of a circuit.
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It has also been reported that Williams Racing feel that the movement exceeded the amount permitted under the rules.
A week earlier, following Norris' victory in the Dutch GP in Zandvoort, Red Bull team principal Christian Horner claimed the angle of McLaren's front wing was "very different to the rest of the grid."
In Italy, Horner said the policing of front wings is "an FIA issue".
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He added: "We've got to leave a bit of trust in them to deal with it. If it's acceptable, then you have to join in."
Ferrari team principal Frederic Vasseur said he would be speaking to FIA single seater director Nikolas Tombazis on the matter. "We have to respect the decision of the FIA, that we'll have again the discussion," he said.
Several teams' front wings were analysed at Spa-Francorchamps in July after an FIA technical directive was sent to teams. The governing body subsequently said: "All front wings checked so far this season have passed the existing deflection tests and are deemed legal."
On Tuesday (September 3) the FIA announced that all front wings currently in use are legal.
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The statement read: "The FIA is examining front wings at every event with numerous checks (conformity of surfaces, conformity of deflections) with respect to the relevant F1 Technical Regulation. All front wings are currently compliant with the 2024 regulations."
McLaren offered no further comment when contacted by SPORTbible.
Topics: F1, McLaren, Ferrari, Lando Norris, Oscar Piastri, Red Bull Racing