Triple world champion Max Verstappen took his 16th win of the season as Red Bull continues to rewrite the record books with its outstanding RB19 car.
The Mexico weekend marked one year since Red Bull was found in breach of the 2021 cost cap rules, which landed it a fine and a reduction on wind tunnel and CFD development.
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That penalty came on top of the Milton Keynes team's success handicap as the reigning world champion, receiving the lowest development allocation of all teams as part of F1's Aerodynamic Testing Restrictions.
However, Red Bull maintained its advantage without carrying out major car developments in 2023, while rivals had to commission significant revamps.
But Horner claimed the full brunt of its handicap is yet to be felt, despite being able to focus most of the team's efforts on 2024.
"Certainly, you've not seen the full impact yet because it obviously has compromised the amount of development that we've been able to do this year," Horner said.
"Thankfully, we came out with a very strong car at the beginning of the year and we've been able to apply most of that development time, from quite early in the season, to next year's car. So, that's been important.
Source: Autosport