Kyle Busch won the Nationwide race at Bristol Motor Speedway on Friday night to become the series' all-time wins leader.
Busch had to hold off a strong challenge from Joe Gibbs Racing teammate Joey Logano to earn his 50th victory in NASCAR's second-tier division.
Busch and Logano drove door-to-door during the final two laps, and Logano briefly surged ahead before Busch beat him by a nose to the checkered flag for the victory.
The win broke a tie with Mark Martin to take over the all-time victory mark.
It was fitting for Busch to break the mark at Bristol, where he's practically unbeatable of late. Friday night's win was his 12th at Bristol spanning all three NASCAR national series.
He has won 102 races in the top three divisions.
Meanwhile, Kurt Busch said he declined an offer from Penske Racing to replace teammate Brad Keselowski in Friday's race.
Busch wanted to focus on helping the No. 22 team prepare for tonight's Sprint Cup race. Busch has failed to finish the past two races and has fallen from fourth to eighth in the standings.
Busch replaced Keselowski in the Nationwide race at Watkins Glen two weeks ago, and earned his first series win since 2006.