Overview
- Drivers reported extreme in-car temperatures at COTA, with multiple cool-shirt failures during the race.
- AJ Allmendinger’s cooling suit quit working, and he received medical attention after exiting his car.
- Alex Bowman withdrew mid-race for medical help and was later ruled out of Phoenix with vertigo.
- Chase Elliott said Next Gen airflow and dual exhaust route hotter air over the car, reducing natural cooling, especially in traffic.
- Elliott noted wider adoption of cooling shirts but warned the systems can fail in saturated heat and said he is unsure what fix NASCAR could apply.