IMCA Modified is the top modified division sanctioned by the International Motor Contest Association.[1] The series began in 1979. It was designed to be a mid-level class between late models and hobby stocks.[2] The first IMCA modified race was held at the Benton County, Iowa Speedway in 1979 on a 1/4 mile track.[3]
The car bodies are hybrids of open wheel cars and stock cars. The front tires have no body around them like an open wheel car, and the back wheels have a body around them like a stock car. The series has a $1,050 engine claim or $100 and exchange rule, and a one tire rule.[1]