NASCAR is set to debut a revised rule package for the Cup Series season‑ending event at Daytona International Speedway, marking the first time the series will test these specifications on a superspeedway. The changes were requested by the drivers themselves and are designed to create larger runs and greater instability.
The new package trims the rear spoiler from seven inches to four, matching the setup used on intermediate tracks, while also reducing engine output from 510 horsepower to roughly 465 using a 27/32‑inch tapered spacer. Modifications to the deflection device, braces and splitter further align the cars with the aerodynamic standards applied to shorter tracks.
Drivers Expect More Unpredictable Racing
Veteran driver Denny Hamlin said the altered package could make the cars “more out of control when they’re pushed,” suggesting that the racing may become less predictable and more prone to dramatic moves.
According to Hamlin, the ability to pass from the back of the field to the front will be easier than in previous years, a factor that could lead to larger packs and more frequent lead changes.
While stages and points still count, Hamlin indicated that they will be less of a focus for him personally, emphasizing the experience of the race itself over championship calculations.
The changes were requested by the drivers themselves, who hope the new aerodynamic balance will produce bigger runs and a more chaotic finish that fans will remember.