A number of F1 teams, including championship leaders McLaren, have opted to introduce a new power unit for the Miami Grand Prix weekend.
Miami hosts the sixth round of the ongoing F1 campaign with McLaren entering the event in the lead of the constructors' championship.
It sits 77 points ahead of second-placed Mercedes, whose drivers have also taken on fresh engine elements.
Lando Norris, Oscar Piastri, George Russell and Kimi Antonelli have received new internal combustion engines, turbochargers, MGU-Hs and MGU-Ks.
However, they are not the only teams to make such changes.
In the midfield pack, the drivers at Aston Martin and Williams have had the same changes made, while Haas has made the changes to Esteban Ocon's car only.
Stake, who sit at the bottom of the constructors' table, have equipped their drivers with a fresh power unit each.
None of the changes fall outside the technical regulations and therefore no penalty will be applied.
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