Michael McDowell pointed his No. 2 Chevy against a concrete barrier at the finish line, burning his tires in a smoky celebration. Finally, a late lead didn't disappear for McDowell at Road America.McDowell edged teammate Brendan Gaughan by 0.534 seconds in overtime on an overcast, sometimes misty Saturday afternoon at the sprawling road course for his first career NASCAR Xfinity Series victory.Brennan Poole was third, while pole-sitter Alex Tagliani finished seventh in the 194-mile race. After five career top-five starts at Road America, McDowell has the ending that he sorely wanted. McDowell finished second in 2012. He dominated most of the race the previous year before losing the lead on the second of three attempts at a green-white-checkered overtime finish.