HOUSTON (AP) — IndyCar and Dallara will allow modifications to create air flow in to the cars to help drivers deal with the heat during this weekend’s doubleheader in Houston.

The modification came after drivers requested a provision for additional cooling of the cockpit and footbox in anticipation of temperatures expected to hit the 90s.

IndyCar authorized a modification that will allow air to flow into the footbox through an opening in the nosebox cap. Dallara in turn built two trimming templates that teams can pick up at the temporary street course on Thursday.

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