KNOXVILLE, Iowa — Watch pay-per-view video coverage of preliminary action leading up to the 13th annual Lucas Oil Late Model Knoxville Nationals as the Lucas Oil Late Model Dirt Series makes its annual visit to Knoxville (Iowa) Raceway on Sept. 15-16. DirtonDirt.com's broadcasts include every lap of preliminary action Thursday and Friday, with a complete racing program headlined by a 25-lap, $7,000-to-win main event scheduled for each day. Coverage includes every lap of on-track action. Multiple cameras, multiple announcers, instant replay and more are featured: