Kyle Busch and his Joe Gibbs Racing team have been docked points and fined after their car was found too low in post-race inspection at Loudon.
Busch finished Sunday's event at New Hampshire Motor Speedway in fifth place, but during the inspection following the race his car was found to be lower than the minimum allowed for the left front fender.
As a result he has been docked 25 points in the drivers' standings, boss Joe Gibbs has been deducted the same amount in the car owners ranking, while his crew chief Steve Addington has been fined $25,000 and placed on probation until the end of the year.
Despite the penalties, Busch remains in 13th place in the championship, the first out of the Chase for the Sprint Cup.