Five days after claiming his first Sprint Cup Series victory at Watkins Glen International, Marcos Ambrose capped off his perfect week in NASCAR by winning Saturday's NAPA Auto Parts 200 Nationwide Series race at Montreal's Circuit Gilles Villeneuve.

Ambrose, a Sprint Cup regular, had to start from the rear of the field since he missed Friday's qualifying session at the 2.71-mile, 14-turn road course. Owen Kelly practiced and qualified Ambrose's No.9 Ford for Richard Petty Motorsports.

Ambrose moved ahead of Canadian Alex Tagliani and took the lead for the first time just after a restart with 10 laps remaining. He then held off Tagliani at the finish by 1.1 seconds for his fourth career Nationwide win. His first three victories in the series came at Watkins Glen from 2008-10. He did not compete in last Saturday's race there.

Michael McDowell finished third, followed by Steve Wallace and J.R. Fitzpatrick, who is also Canadian.

Ricky Stenhouse Jr. now holds an eight-point lead over Reed Sorenson. Stenhouse suffered engine failure on the final lap and finished 26th, one spot ahead of Sorenson, who spun around on the second-to-last lap.