The Penske Racing team members worked together during the two-lap overtime finish as they came up on the outside against then-leader Matt Kenseth.
After pulling ahead of Kenseth on the final lap, Keselowski squeezed by Busch and bested him by 0.3 seconds for his second title of the season and sixth Sprint Cup championship of his career.
Sunday's victory gave Dodge its first Talladega victory since August 1976.
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