USA Today Sports' Jeff Gluck breaks down the Jeff Kyle 400 at The Brickyard.
INDIANAPOLIS — Heat inside the cars has suddenly become a major concern for drivers heading into Sunday’s Jeff Kyle 400 at Indianapolis Motor Speedway.
Drivers in Saturday’s Xfinity Series race said they experienced abnormally high temperatures inside the cars, and some cited the new high-drag aerodynamic rules package as part of the reason.
"Expecting tomorrow to be the hottest race I've ever drove in. 140+," Brad Keselowski tweeted. "Definitely hotter with this rules package.