At Indianapolis Motor Speedway this weekend, NASCAR will debut its second track-specific rule package of the season. The NASCAR Sprint Cup Series package planned for Indianapolis includes a 43-inch radiator pan (increased from 38 inches), a two-inch splitter leading edge, a one-inch wicker bill and nine-inch spoiler (increased from six inches). The increased downforce adds drag to the car and creates a larger draft window in the back.
For Indianapolis, teams will be allowed to change their engines prior to qualifying and data will be permitted at practice. A single gear will be used, but teams will bring four different gears. NASCAR will determine which gear is needed after practice. Teams will start on a 3.70 gear.
The Indianapolis rule package differs from the first track-specific rule package used this season at Kentucky which created lower downforce. The modifications helped produce a track-record 22 green-flag passes for the lead and a total of 2,665 green-flag passes overall.(NASCAR)
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