On Friday, NASCAR officials took the hood louves from all four Hendrick Motorsports Chevrolets.
The four Hendrick cars were allowed to practice at Phoenix Raceway with the parts with officials taking them following the session which served as the debut for NASCAR’s new rule package to be used on short ovals and road course races in 2023.
The hood louvers are openings on the hood of a vehicle that allow for the transfer of air from the radiator through ducts. This feature helps to improve engine performance by releasing excess heat and increasing airflow.
NASCAR will take the parts to their Research & Development Center for further evaluation next week with any penalties being announced next week.