NASCAR officials took the hood louvers from the four Hendrick Motorsports Chevrolets at Phoenix Raceway, and the sanctioning body will bring them to the NASCAR Research & Development Center for further evaluation next week in Concord, North Carolina.
During initial inspection Friday, league officials discovered a potential issue that needs further examination. Hendrick cars were permitted to use those louvers in practice, with officials taking them after the opening session at the 1-mile track.
There is no penalty to Hendrick cars this weekend, and any potential penalties would be announced next week.
— NASCAR.com —