Ford Mustang, the country’s best-selling sports car for 22 consecutive years and one of the auto industry’s most successful nameplates ever, celebrates its 45th anniversary with a new panoramic glass roof option that opens the world to pony-car enthusiasts from Maine to Maui and all points between. The segment first, factory-installed glass roof is available as a $1,995 option on Mustang V-6 and GT models.