How Mercedes and others copied Ferrari's exhaust wing

Mercedes has joined a growing list of Formula 1 teams adopting their own versions of Ferrari's innovative exhaust wing concept, with six teams debuting new designs at the Miami Grand Prix. This rapid replication highlights the intense technical competition and the clever exploitation of a regulatory gray area to gain aerodynamic benefits.

Why it matters:

The scramble to copy Ferrari's design underscores the relentless pace of development in Formula 1, where even small aerodynamic gains are fiercely pursued. It also demonstrates how teams creatively interpret technical regulations to find performance advantages, turning a potential one-team innovation into a widespread grid trend within a few races.

The details:

• Ferrari introduced a unique winglet behind the exhaust tailpipe during pre-season testing. Its primary function is to use hot exhaust gases to better manipulate airflow from the diffuser toward the rear wing, generating additional downforce.
• Initially, rivals believed copying it fully was impossible without redesigning their entire rear crash structure and gearbox—a prohibitively expensive change under the cost cap. Only Haas, which uses Ferrari's gearbox, could implement a similar version earlier in the season.
• However, teams found a loophole. Article C3.9.2 of the technical regulations allows for a single exhaust tailpipe "support," provided it fits within specific legality boxes. Teams have designed their "supports" to function as aerodynamic wings.
• The Miami GP revealed distinct interpretations from six teams:
  • Mercedes: Features a concept that resembles a miniature rear wing.
  • McLaren: Uses a small plate at the bottom of the tailpipe to divert airflow upward, with a clear support wing below.
  • Red Bull: Has a larger plate cover than McLaren's for redirecting airflow.
  • Williams: Incorporates a scoop-like design that helps channel exhaust gases upwards.
  • Alpine: Showcases a double-element design, with bodywork extending across the crash structure below a wing fed by the tailpipe. Alpine also had to alter its tailpipe angle for compliance.
  • Cadillac: Appears to use a partial lid fitted to the rear end of the exhaust.
• Only Aston Martin, Racing Bulls, and Audi are currently without an exhaust wing, though they may have developments in progress.

What's next:

The evolution of this concept is likely to continue as teams refine their designs for greater aerodynamic efficiency. The focus will now shift to which team's interpretation yields the most significant performance gain on track. Furthermore, the FIA may scrutinize these developments to ensure they remain within the spirit of the regulations, potentially leading to further clarifications or restrictions. This episode is a classic example of F1's technical arms race, where innovation is quickly dissected and replicated across the grid.