Brad Keselowski led the way in final practice for the Sprint Cup Series field at Darlington Raceway after ripping around the 1.366-mile track in 28.157 seconds.
Under the heat of the South Carolina sun, the field experienced different conditions to race time on Sunday night, as the 500-miler will mostly be run under the lights. Despite the difference, Johnson, who led opening practice on Saturday, ran a session-high 74 laps, joining 13 other drivers who ran more than 50 laps in the 80-minute session.
Just outside the top 10 were both 2016 Cup rookies in Ryan Blaney and Chase Elliott, who were separated by 0.001 seconds.
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