HAMPTON, Ga. -- The cars of fifth-place finisher Kyle Larson and 12th-place Nelson Piquet Jr. failed post-race inspection following Saturday night's Great Clips/Grit Chips 300 at Atlanta Motor Speedway, according to NASCAR officials.
The two Chevrolet entries, which are fielded by Turner Scott Motorsports in the Nationwide Series, measured too low on the front end, according to officials.
Resulting penalties for the infractions would likely be announced Sept. 3.
Both drivers are competing for Sunoco Rookie of the Year honors in the series with Larson seventh in points and Piquet Jr. 11th.
On Aug. 30, it was announced that Larson would become the driver of the No. 42 Chevrolet for Earnhardt Ganassi Racing in the NASCAR Sprint Cup Series next season.
Saturday night's fifth-place finish was his 14th in 24 starts this year.
Similar infractions previously announced in the series have resulted in the loss of six championship driver and owner points. Such a penalty would drop Larson from seventh to ninth in the standings, while Piquet Jr. would lose one points position, falling from 11th to 12th.
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