ABERDEEN, S.D. – IMCA Modifieds make their Brown County Speedway debut next Monday and Tuesday, July 16 and 17, in $1,000 to win main events on the 1/3-mile clay oval.Both features are 2018 Fast Shafts All-Star Invitational ballot qualifiers. IMCA Speedway Motors Weekly Racing National, Side Biter Chassis North Central Region, South Dakota State and track points will be awarded.Pit gates open at 2 p.m., the grandstand opens at 4 p.m. and racing follows 6:30 p.m. hot laps both days. Lucas Oil ASCS Sprint Cars are also on the card Monday, the Lucas Oil Late Model Dirt Series on Tuesday.There is no entry fee for the Modifieds. Pit passes are $25 on Monday and $40 on Tuesday.Adult grandstand admission is $20 on Monday and $35 on Tuesday. Kids ages 7-13 are $10 and six and under get in free both days.More information is available by calling 605 868-4141.