I don't think anything has changed with the plate package in years. They modified the cooling system and grille opening to eliminate the tandem drafting in the late years of the COT, but I don't believe any significant changes have happened over the lifespan of the Gen6.
My memory isn't always that great, so I could be wrong.
SONOMA, Calif. -- NASCAR will return to Daytona International Speedway next week with the same basic aerodynamic package that it used for the Daytona 500 and Talladega earlier this year.