The 2003 Sirius 400 was a Winston Cup (now Sprint Cup) event held at Michigan International Speedway on June 15, 2003. Kurt Busch rolled to another superspeedway victory, holding off Bobby Labonte by three-quarters of a second. Points leader Matt Kenseth registered a 4th place showing and now held a 185-point cushion on Dale Earnhardt, Jr (7th). Stats
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