Mark Martin took the lead in the last quarter of the race and held on to win a 400-lap race Sunday at Brooklyn, Mich., while padding his NASCAR Winston Cup point lead.
It was an important victory for Martin, 31, who is trying to earn his first Winston Cup series title.
Martin, driving a Ford Thunderbird, led 70 of the final 76 laps, including the last 39, to beat Greg Sack in a Chevrolet Lumina by 1.7 seconds. Martin, who won $71,200, averaged 138.821 m.p.h.
Geoff Brabham of Australia took a big step toward his third consecutive IMSA GT driving championship by winning the Nissan Grand Prix of Road America, at Elkhart Lake, Wis.
Brabham averaged 113.111 m.p.h. for 39 laps of the four-mile road course.
John Force won his sixth funny car class race of the season in the NHRA NorthStar Nationals at Brainerd, Minn.
Force, in his Oldsmobile Cutlass No. 1, was clocked at 5.389 seconds elapsed time at 269.29 m.p.h.
Joe Amato won the top-fuel competition with a track-record elapsed time of 4.970 seconds, reaching 273.390 m.p.h.
Bruce Allen drove a Chevrolet Beretta to victory in pro stock with an elapsed time of 7.377 and a speed of 185.41 m.p.h.