Get our free mobile appIf you've been waiting for a weekend packed with stock car racing, Iowa Speedway is the place to be. The action begins Friday and builds all the way to Sunday's NASCAR Cup Series Iowa Corn 350 Powered by Ethanol. Credit: Meg Oliphant/Getty Images | NEWTON, IOWA - AUGUST 03: William Byron, driver of the #24 Raptor Chevrolet, celebrates with a burnout after winning the NASCAR Cup Series Iowa Corn 350 Powered by Ethanol at Iowa Speedway on August 03, 2025 in Newton, Iowa. Credit: Meg Oliphant/Getty Images | NEWTON, IOWA - AUGUST 03: William Byron, driver of the #24 Raptor Chevrolet, celebrates with a burnout after winning the NASCAR Cup Series Iowa Corn 350 Powered by Ethanol at Iowa Speedway on August 03, 2025 in Newton, Iowa. Credit: Sean Gardner/Getty Images | NEWTON, IOWA - AUGUST 03: William Byron, driver of the #24 Raptor Chevrolet, eats corn in celebration in victory lane after winning the NASCAR Cup Series Iowa Corn 350 Powered by Ethanol at Iowa Speedway on August 03, 2025 in Newton, Iowa.