Mason City Motor Speedway

Third-starting Johnson, of Independence, Iowa, took the lead on lap 15 and paced the final 11 circuits, topping Sunday's 16-car field for his first career series win and collecting $1,000. ... Fifth-starting Logan Duffy finished second, 0.880 of a second back. ... Travis Smock led the first lap before dropping to fourth. ... C.J. Horn led laps 2-14 before fading to sixth. ... Greg Kastli and Corey Dripps won heats. ... Sunday's 24-minute feature saw eight drivers complete 25 laps with eight running at the finish.