John Hunter Nemechek – No. 4 Mobil 1 Tundra Camping World Trucks Knoxville Preview July 7, 2021 Bryan Delay Articles NASCAR Camping World Truck Series Overview: Event: Corn Belt 150, Race 14 of 22, 150 Laps – 40/50/60; 75 Miles Location: Knoxville (Iowa) … Source: camping & Water Filtration