Race weekend: Friday Sept. 16 – Sunday, Sept. 18 Track: Sonoma Raceway, a 2.385-mile permanent road course in Sonoma, Calif. Entry list: GoPro Grand Prix of Sonoma (pdf) Race distance: 85 laps / 202.7 miles Push-to-pass parameters: 10 activations for 15 seconds each Firestone tire allotment: Seven sets primary and three sets alternate for use through the weekend Twitter : @RaceSonoma, @IndyCar, #IndyCar,…

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