Watch this video and more on Insight TV
We follow Shannon Campbell, the first 3-time champion of the King of the Hammers. But his kids, also young drivers, push their dad to the brink of his limits.
It's mud, sweat, and gears as drivers battle it out in the toughest Ultra 4 race yet.
It's all or nothing as underdog Tom Liu drives himself to the brink in a heart-stopping Ultra 4 race.
Team Indiana, the underdogs of Ultra 4, take the fight to the enemy.