SIOUX CITY, Iowa – Park Jefferson Int’l Speedway hosted the Arnold Motor Supply Dirt Knights Tour Monday night and Richie Gustin won the IMCA modified main event.

A 37-car field on modifieds were part of a four division, 85 car turnout at the three-eighths-mile South Dakota track.  Dirt Knights procedures are passing/finishing points in heats with the top 12 moving directly to the A main.

A pair of B mains elevated an additional six drivers from each to set the 24-car field for 30 laps. Offering a $2,000 check to win, the Tour was racing the first of four consecutive nights.

Josh Most took the lead initially, a three lap stint that ended when Gustin sped past Most on the back stretch on lap four on the inside line.

Most and Jesse Sobbing dueled numerous laps for second while Gustin stretched his lead.  The battle for second was not settled until lap 21 when Sobbing used the low line exit from turn four to edge Most at the line. Gustin successfully dealt with traffic during this long green session.

A yellow with 22 complete offered an additional challenge to Gustin’s lead, and the Gilman, Iowa driver was able to keep the lead and record the win.

Sobbing finished second ahead of Most while Joel Rust and Chris Abelson filled the top-five.

Three divisions ran two main events as makeup races from the July 1 Midwest Madness Tour were completed. Sport mod racing belonged to Cody Thompson with a sweep of the pair of mains, running his streak to 8 straight.

IMCA stock cars had two thrilling mains and Travis Barker won with a last lap pass in a photo finish while earlier Aaron Cain won the $1,500 to win makeup race.

Craig Clift took the night’s hobby stock main and Jesse Sobbing backed up his second place Dirt Knights finish by winning the $1,500 prize for the Madness Tour makeup.