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Robbie is determined to buy the granddaddy of woody trailers, and Mike turns to one of the best mechanics in the country to breathe life into a bundle of ultra-rare Harleys and Indians
In Pittsburgh, a real-life heavy metal hero reveals his mind-boggling stockpile. And in Tennessee, the team revs up for a white-knuckle winner-takes-all go-kart smackdown.
At Detroit's abandoned Packard plant, Mike gets a tour of an American landmark before it disappears. And in Buffalo, Retro Ron's collection features the Holy Grail of vintage bikes.