Mercedes, Red Bull and Ferrari have made engine and gearbox changes within Charles Leclerc's, Sergio Perez's and George Russell's cars ahead of the Miami Grand Prix.
Russell and Perez join Fernando Alonso (Alpine) and Kevin Magnussen (Haas) in taking a new gearbox case and cassette, along with a fresh gearbox driveline, gear change components and auxiliary components.
Meanwhile, Leclerc has joined Pierre Gasly and a list of drivers from Ferrari customer teams in taking a new Internal Combustion Engine (ICE).
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No penalties for Leclerc, Perez or Russell
The changes were confirmed in a note issued by FIA Formula 1 Technical Delegate Jo Bauer shortly before FP1 for the Miami GP.
All of the aforementioned components are within the limit of four for the season, meaning no drivers listed will face a penalty as a result of the various changes.
Leclerc topped the timing sheets in FP1, closely followed by Russell, with the two Red Bull cars of Max Verstappen and Perez placing fourth and fifth.
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