American Chopper is an American reality television series that is still on air on Discovery Channel from 2003, produced by Pilgrim Films & Television. The series centers on Paul Teutul Sr. (frequently called Senior), and his son Paul Teutul Jr. (also known as Paulie or simply Junior), who manufacture custom chopper-style motorcycles. Orange County Choppers is in Newburgh, New York. The contrasting work and creative styles of the father-and-son team and their resulting verbal arguments were the series' hallmark until 2008 when an explosive argument led to Paul Jr. 's termination and departure to start a competing chopper company, Paul Jr. Designs.