"It's unbelievable!" Gordon, 42, screamed over his team radio after he crossed the finish line about 1.5 seconds ahead of second-place
His victory came 20 years after the inaugural Brickyard 400 in 1994, which Gordon also won, when he was 22. He took first place again in 1998, 2001 and 2004.
"I don't think there's a greater feeling as a race-car driver" than winning at Indy, Gordon told a television audience.
Gordon's victory in the No. 24
Kahne was leading, and Gordon was second, when the field had its final restart with 17 laps left in the 160-lap race. Gordon quickly passed Kahne on the outside and never let Kahne close again.
"I made the restart of my life today," Gordon said.