The National Tractor Pullers Association is coming to the Knoxville Raceway next Thursday. The tour will bring its region five pullers to the Marion County Fairgrounds for a show. N-T-P-A Region Five Director Dale Quamme says four classes will be in Knoxville that night, Super Farm Tractor, Heavy Super Stock Diesel Tractor, Modified Four Wheel Drive Trucks, and Two Wheel Drive Trucks. Fans may notice that the Super Farm Tractor class will resemble an everyday tractor seen on a farm. Quamme says they may resemble the farm tractor, but that is where the similarities end. Quamme adds the Heavy Super Stock Diesel class will produce in upwards of 2,000 horsepower. The truck and tractor pull is scheduled for six P-M next Thursday at the Knoxville Raceway.