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IMSA: Westbrook, Pumpelly nab Detroit poles

May 30, 2014, 6:29 PM EST

WestyDETPole Getty Images

In a great back-and-forth bout, Richard Westbrook edged Ryan Dalziel for the pole position for Saturday’s Chevrolet Sports Car Class¬†Presented by¬†the Metro Detroit Chevy Dealers, the Belle Isle Park round of the 2014 TUDOR United SportsCar Championship.

Dalziel moved to the top near the end of the 15-minute session in the No. 1 Extreme Speed Motorsports HPD ARX-03b, at 1:25.029, before Westbrook one-upped him in the final moments at 1:25.011 in the No. 90 Spirit of Daytona Corvette DP.

Overall, the top six featured four Daytona Prototype-spec cars and two P2-spec cars, separated by only 0.765 of a second at the 2.35-mile street course.

In GT Daytona, Spencer Pumpelly took his second straight class pole position in the No. 45 Flying Lizard Motorsports Audi R8 LMS at 1:32.914. Five manufacturers finished in the top five positions (Audi, SRT Viper, Porsche, BMW and Aston Martin).

Westbrook will co-drive with Michael Valiante; Pumpelly with Nelson Canache. Saturday’s race commences at 12:10 p.m. ET.