High Voltage (ハイ・ヴォルテージ Hai Vorutēji) is the twenty-first story arc in Steel Ball Run.
After healing Steven, Lucy, and himself, Johnny contemplates the end of his search for the Holy Corpse. After observing the last horseriders still in the race pass by, Johnny realizes that the Corpse has been stolen by a last unknown enemy. It went totally unnoticed and Johnny spots familiar horseshoe prints, leading to him identifying the culprit as at least a Steel Ball Run contestant. Being informed by Steel that he Corpse is probably headed to the final stage of the race in Manhattan Island and determined to take back the Corpse, Johnny continues the race and pursues whoever stole the Corpse. The final stage: the Manhattan Rhapsody, a 15 km dash through New York's streets.
Before the 9th stage, the racers still have to reach Union Beach. In the way, Johnny catches up to the mysterious culprit, but as Johnny shoots him, the rider and his horse disappears and reappears behind him. Johnny turns back: it is Diego Brando from an Alternate Universe, wielding the time stopping Stand THE WORLD, who attacks him.
A flashback reveals that Valentine continuously searched for a Stand user he could entrust the Corpse to, and who could beat the Super Spin, and met Dio. Convincing him to follow him to the base world, he hid Dio underground in case his initial plan wouldn't work. Johnny is unsaddled and shoot several nail bullets at Dio. Both realizes what the other is capable of, and aim to devise at plan which will counter the other's power.
Johnny Joestar finishes the 8th stage at the 5th place, and as the announcer declares that even at the last stage, anyone among Johnny, Dio, Pocoloco and Norisuke Higashikata can seize victory. In the ferry used as a transitional rest between the 8th and 9th stage, Johnny analyzes Dio's timestop and concludes that Dio mustn't see the attack coming. Disembarking, Johnny meets with his father George Joestar, and they silently reconcile, George publicly apologizing for his son, who rode through America. It is a Johnny with renewed will who pursues Dio.
Another shot of the Super Spin nails throws Dio off, who sees that the timestop doesn't completely affect Tusk. Using gas and matches, Dio tries to light Johnny and his horse up from afar, but Johnny opens the ground with Tusk ACT4, disappearing in the sewers. Dio is now in a weak position, unable to see the next attack. He then lets his fangirls hug him, who are killed in Dio's stead by the rotation. Johnny joins the rest of the racers on the brooklyn Bridge, for one final attack. Johnny shoots his Super Spin nail as Dio stops time.
- 090 (842). High Voltage, Part 1
- 091 (843). High Voltage, Part 2
- 092 (844). High Voltage, Part 3
- 093 (845). High Voltage, Part 4
- The name of the story arc is a reference to the AC/DC album of the same name.