Kyle Busch, the Sprint Cup champion, remains a terror in the lower-level Xfinity Series. He failed to gain his record fourth consecutive victory on Saturday, foiled by a flat tire on the final lap.
Meanwhile, questions flew about Busch's action as Austin Dillon passed him on the way to win the TreatMyClot.com 300 by Janssen.
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.@austindillon3 SQUEAKS by a damaged @KyleBusch car on the last turn to win!