2006 NASCAR Nextel Cup SeriesPrevious2005Next2007Champions | Seasons The 2006 NASCAR Nextel Cup Series was the 58th season of professional Stock car racing in the United States and the 35th modern-era NASCAR Cup series season. It was started at Daytona International Speedway on Sunday, February 12 with the Budweiser Shootout and ended on Monday, November 20, with the Ford 400 at Homestead-Miami Speedway. The Chase for the Nextel Cup began with the Sylvania 300 on Sunday, September 17, at New Hampshire International Speedway. This was the last full-time season with the Gen 4 car.