Ferrari and Red Bull have made some changes to the gearboxes within Carlos Sainz and Max Verstappen's cars ahead of the Emilia Romagna Grand Prix.
Both drivers have taken on a new gearbox case and cassette, along with a fresh gearbox driveline, gear change components and auxiliary components.
No penalties for Sainz or Verstappen
The changes were confirmed in a note issued by FIA Formula 1 Technical Delegate Jo Bauer shortly before qualifying at Imola, which is running to the Sprint format.
All of the aforementioned components are within the limit of four for the season, meaning neither driver will face a penalty as a result of the various changes.
Sainz finished second to teammate Charles Leclerc in a wet first practice session on Ferrari's home soil, with reigning World Champion Verstappen a distant third.
F1 Podcast: Can fast but fragile Red Bull respond to Leclerc's charge?
RacingNews365.com F1 journalists Dieter Rencken, Mike Seymour and Thomas Maher look back over the Australian Grand Prix, where Ferrari's Charles Leclerc triumphed and Red Bull's Max Verstappen retired.