NASCAR updates rules to help cool cars at Michigan

NASCAR has addressed the heat issues that plagued last month's racing at Indianapolis Motor Speedway with a rules mandate for this weekend at Michigan International Speedway. Drivers complained it was too hot in the cockpit of their cars with the high-drag rules package, which was first used at Indianapolis and will return at Michigan.

The package reduces airflow under the car, so heat is trapped in the cockpit and several drivers were almost ill following the Xfinity Series race at Indy. But NASCAR on Wednesday mandated a dual outlet duct be used on the right-side window to help ventilate the cockpit. With the heat issue now addressed, the focus shifts to durability concerns at Michigan, the fastest track in NASCAR. Associated Press

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