RELATED: Recap from first practice session
It's the first time the new generation of stock car has been tested on a 1.5-mile intermediate track, a type that comprises the majority of the NASCAR Sprint Cup Series schedule.
The No. 16 Roush Fenway Racing driver had a best speed of 189.427 mph on his 59th lap of 61 during the second session. It equated to a lap of 28.507 seconds.
Biffle's showing was the highlight of an impressive day from Roush Fenway Fords. His teammates, Carl Edwards and Ricky Stenhouse Jr., finished in the top six. Edwards, who won last week's Subway Fresh Fit 500, was fourth in the second session with a top speed of 189.102 mph. Stenhouse, at 188.798 mph, was sixth.
Matt Kenseth, currently 18th in the points standings, had the top speed in the first session. The Joe Gibbs Racing driver turned his 25th lap in 28.816 seconds with a best speed of 187.396 mph in his No. 20 Toyota.
Forty-two cars got on the track in the first session -- Michael McDowell and Mike Bliss stayed in the garage, although both participated in the second session.
Qualifying for Sunday's Kobalt Tools 400 is scheduled for Friday at 6:40 p.m. The first practice session for the race is scheduled for Friday at 3 p.m.
Second session results
First session results
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