(UNDATED) - Joe Gibbs Racing apologized for flunking a post race inspection and declined to appeal the penalties that cost their drivers a win and second-place finish on Sunday. NASCAR carried out its stiffest punishment against a race winner in more than 60 years when it stripped JGR's Denny Hamlin of his Pocono Raceway victory and teammate Kyle Busch of his runner-up finish. NASCAR found issues in both of the Toyotas that affected the aerodynamics. Scott Miller, NASCAR's senior vice president of competition, said Monday on Sirius XM the exact issue was "extra layers of vinyl" found under the wrap of the car, more commonly known as the paint scheme, that essentially modified that area of the lower nose on each car. Hamlin was the first Cup winner to be disqualified since April 17, 1960, when Emanuel Zervakis' victory at Wilson Speedway in North Carolina was thrown out because of an oversized fuel tank. Hamlin was stripped of what would have been his third Cup Series win of the season and a track-record seventh at Pocono. Chase Elliott finished in third place and was awarded the victory without the Hendrick Motorsports driver ever leading a lap in his No. 9 Chevrolet.