Southern Iowa Sprint Week takes the green flag tonight with the Xtreme By Mediacom 33rd Annual 360 Knoxville National Nationals presented by Great Southern Bank. 108 entries will vie for the next three nights at the Knoxville Raceway for a winner’s share of $20,000, a total that could rise to $35,000 if the winner leads all 30 laps of Saturday Night’s championship race. Many of the favorites are drivers who have raced at Knoxville this season. Aaron Reutzel is the defending champion and has four 360 wins at Knoxville this season. Another driver that has a chance to get his first career win is Chase Randall, who has won three times in a 360 at Knoxville. There are also seven past champions of the 360 Nationals in the field including Sammy Swindell, Terry McCarl, Reutzel, Clint Garner, Kerry Madsen, Wayne Johnson, and Brian Brown. Listen for all of the coverage starting at 5:00pm with Live Track Side and at 7:00pm for Race Nights Live on the DeYarman Automotive Radio Racing Network on KNIA.