Ferrari has introduced four interconnected aerodynamic upgrades to the SF-26 for the 2026 United States Grand Prix, targeting improvements to the floor, sidepods and diffuser in an effort to generate more downforce. The Italian team is among seven Formula 1 constructors bringing new components to the Circuit of The Americas, with the FIA’s official technical submissions revealing an extensive final-stage development effort ahead of the Austin weekend.
Ferrari and Racing Bulls have declared the largest packages by number of updated areas, with four each. McLaren and Audi follow with three apiece, while Red Bull, Alpine and Cadillac have introduced two changes each. Mercedes, Williams, Aston Martin and Haas have not declared any new components for the event.
For Charles Leclerc and Lewis Hamilton, the Ferrari package represents an important opportunity to improve the SF-26’s aerodynamic performance during the closing stages of the championship. Rather than concentrating on one isolated component, the Maranello engineers have revised several connected surfaces to improve how air travels beneath and around the car before reaching the diffuser.
Ferrari SF-26 Austin upgrades target four connected aerodynamic areas
The central objective of Ferrari’s Austin development is to increase downforce from the floor while improving the energy, quality and stability of the airflow feeding the rear of the car. Four areas have been revised, with each modification designed to complement the others.
1. Floor body: Ferrari has redesigned the floor’s front leading edge and introduced a different arrangement for the floor-fence supports. The internal vertical and upper horizontal elements have also been modified, with the intention of increasing aerodynamic loading at both the front and rear of the floor.
These changes are designed not only to produce additional local downforce but also to improve the airflow travelling towards the rear of the SF-26. This makes the floor body an important starting point for the wider development package.
2. Floor fences: A revised support arrangement accompanies changes to the internal vertical and upper horizontal fence profiles. These elements help organise the airflow entering and travelling beneath the floor, with Ferrari seeking both increased aerodynamic loading and more stable flow downstream.
The relationship between the floor body and fences is particularly important because the effectiveness of the rear floor and diffuser depends heavily on the characteristics of the air arriving from further forward.
3. Sidepod inlet and coke-bottle area: The Scuderia has introduced additional volume in the lower sidepod-inlet region and reshaped the undercut and coke-bottle sections of the bodywork. The modifications aim to manage the airflow travelling along the sides of the car more effectively, supporting the downforce improvements sought beneath the floor.
Rather than functioning independently, the new bodywork geometry is intended to work with the revised floor architecture by improving airflow stability as it moves towards the rear aerodynamic surfaces.
4. Diffuser: Ferrari has revised the diffuser’s volume, expansion profile, fence loading and external aerodynamic elements near the trailing edge. The new geometry has been optimised to take advantage of the improved airflow generated by the upstream modifications.
This final element completes the aerodynamic development package. By improving the air reaching the diffuser, Ferrari aims to generate greater downforce more efficiently, making the changes closely connected rather than four unrelated adjustments.
The developments provide a more detailed picture of the Ferrari Austin upgrade programme, which arrives as the team looks to respond to the recent progress made by its Formula 1 competitors.
Why Ferrari’s new floor and diffuser matter at the United States GP
The Circuit of The Americas provides a varied test of aerodynamic performance. High-speed corners, rapid direction changes, long straights and substantial elevation changes force teams to compromise between downforce generation, aerodynamic efficiency and stability.
For Ferrari, the objective is to develop an SF-26 that maintains effective aerodynamic behaviour across these different conditions. Greater downforce can improve cornering performance, but the quality and consistency of that downforce are also important as the car moves through different speeds, steering inputs and ride-height conditions.
The floor and diffuser are central to this challenge. Improving the airflow feeding the rear of the car can help the diffuser operate more effectively, while revisions to the sidepods and floor fences support the aerodynamic behaviour of the complete package.
These are objectives identified in Ferrari’s official upgrade submission rather than confirmed performance gains. Their effectiveness will become clearer once the SF-26 runs on track during the 2026 United States Grand Prix weekend.
McLaren introduces new diffuser and wheel-area aerodynamic changes
McLaren has submitted three updates, concentrating on airflow management around the front and rear wheels and beneath the car.
The front-corner development involves revised ducting and aerodynamic elements associated with the front suspension fairings. These modifications are intended to improve the management of air passing through this region.
At the rear corner, local aerodynamic elements have been reshaped to improve airflow control and generate additional local downforce. The third update introduces a new diffuser geometry designed to increase downforce across the car’s speed range rather than targeting one particular operating condition.
Together, the three changes are intended to improve the efficiency and consistency of McLaren’s aerodynamic performance as the championship approaches its conclusion.
Red Bull focuses on front-wing refinement and reliability
Red Bull has adopted a more limited approach at Austin, declaring two changes rather than a comprehensive new aerodynamic package.
The first involves a small additional aerodynamic profile on the lower section of the front-wing endplate, incorporated into the team’s recently introduced front-wing configuration. The component is associated with tyre surface-temperature evaluation and is designed to increase local downforce while retaining airflow stability similar to the previous version.
The second modification concerns reliability rather than outright aerodynamic performance. Red Bull has revised the perimeter of an elastomeric protective component in the front-corner area to reduce the risk of tearing under operational loads.
The modification specifically addresses stresses created by deformation when maximum steering lock is applied. Both updates therefore refine existing components rather than introducing a fundamentally different aerodynamic configuration.
Racing Bulls matches Ferrari with four Austin updates
Racing Bulls is the other team declaring four changes for the United States Grand Prix, with developments affecting both wings, the floor and the engine-cover bodywork.
A redesigned front-wing endplate aims to improve the control of airflow around the front tyres and enhance the quality of the air travelling towards the rear of the car.
The rear wing receives revised flap elements, with changes to their camber and chord intended to produce cleaner local airflow and generate additional downforce.
Further modifications have been made to the floor’s leading-edge devices, side fence and outer edge. These revisions are designed to improve aerodynamic flow management and increase the downforce produced by the floor.
Finally, the engine cover has been reprofiled around its shoulder and undercut regions. Working alongside the floor changes, the new bodywork geometry aims to improve airflow along the sidepods and towards the rear of the car.
Audi continues its front-end development programme
Audi has introduced three refinements to its existing aerodynamic configuration, all concentrated around the front of the car.
A new front brake-cooling duct features revised cooling characteristics while also providing aerodynamic benefits. The modification complements the team’s more recently introduced developments.
Audi has also changed the geometry of the front floor fence to improve local airflow management and contribute to the floor’s overall aerodynamic performance.
The third update is a redesigned mirror stay, adapted to work with the revised front-end configuration. Together, the three components are intended to improve the performance of Audi’s existing package rather than introduce an entirely new aerodynamic concept.
Alpine revises rear floor and wing to increase downforce
Alpine has concentrated both of its Austin developments on the rear of the car, aiming to improve aerodynamic loading and the interaction between neighbouring components.
The rear floor corner has been redesigned to improve how local airflow interacts with surrounding aerodynamic surfaces. The intention is to generate more downforce in that region while improving the behaviour of the flow reaching components further rearwards.
The second change affects the rear wing, where the second and third flap elements have been reprofiled. Alpine expects the revised geometry to improve airflow quality and increase the downforce produced by the wing.
Both developments are therefore focused on enhancing rear-end aerodynamic performance through relatively targeted modifications.
Cadillac targets ride-height sensitivity and power unit cooling
Cadillac has declared two updates with different technical objectives: improving aerodynamic stability and increasing cooling capacity.
The first is a revision to the front floor fences. Their new geometry is intended to improve airflow travelling towards the rear while reducing the car’s aerodynamic sensitivity to ride-height variations. Importantly, the modifications are designed to achieve this without sacrificing overall downforce.
The second change concerns the cooling louvres positioned on the upper sidepods. Cadillac has revised these openings to provide greater power unit cooling capacity while minimising the associated aerodynamic penalties.
The combination addresses both the consistency of the car’s aerodynamic performance and its cooling requirements.
Four F1 teams arrive in Austin without declared upgrades
Mercedes, Williams, Aston Martin and Haas have not declared any new components in the FIA’s technical update summary for the United States Grand Prix.
The absence of new declarations contrasts with the seven teams continuing to introduce modifications, although the number of updated components alone cannot establish the scale of any resulting performance improvement.
Austin arrives at a stage of the championship when development priorities must increasingly account for the remaining races and the resources available for future projects. Several teams have chosen to refine existing aerodynamic packages, while Ferrari and Racing Bulls have submitted more extensive groups of changes.
Ferrari faces an important test of its final SF-26 development direction
The common theme across the Austin upgrade submissions is the pursuit of more effective airflow management, particularly around the floor, sidepods and rear aerodynamic surfaces.
Ferrari’s package stands out because of the relationship between its four modifications. The revised front floor and fences aim to improve the air travelling beneath the car, the reshaped sidepods support its movement towards the rear, and the diffuser is designed to exploit the resulting flow more efficiently.
This integrated approach reflects the importance of aerodynamic consistency as well as maximum downforce. For Charles Leclerc and Lewis Hamilton, the United States Grand Prix will provide the first competitive assessment of whether these developments deliver the improvement Ferrari is seeking.
More analysis of the SF-26’s evolving aerodynamic configuration is available through the dedicated Ferrari technical analysis section.
With seven teams introducing new parts, Austin will also provide an opportunity to assess how the latest development efforts influence the competitive order. Ferrari has brought one of the weekend’s broadest aerodynamic packages, but its value will ultimately depend on how effectively the four revised areas work together on track.
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