Chad Knaus, crew chief of the No. 48 Chevrolet, inspects the rear spoiler during practice for the NASCAR Sprint Cup Series Crown Royal Presents the Jeff Kyle 400 at the Brickyard at Indianapolis Motorspeedway on Friday, July 24, 2015 in Indianapolis.
Chad Knaus, crew chief of the No. 48 Chevrolet, inspects the rear spoiler during practice for the NASCAR Sprint Cup Series Crown Royal Presents the Jeff Kyle 400 at the Brickyard at Indianapolis Motorspeedway on Friday, July 24, 2015 in Indianapolis. Brian Lawdermilk Getty Images
Chad Knaus, crew chief of the No. 48 Chevrolet, inspects the rear spoiler during practice for the NASCAR Sprint Cup Series Crown Royal Presents the Jeff Kyle 400 at the Brickyard at Indianapolis Motorspeedway on Friday, July 24, 2015 in Indianapolis. Brian Lawdermilk Getty Images

Spoiler alert: NASCAR trying out new aerodynamic package at Indy

July 24, 2015 10:53 PM