In June 2008, Ryan Thomas built his first dirt modified racecar in his 24-by-24-foot garage near Martinsville, IN. By the end of 2009, he had built four cars for local customers, all of which had scored wins. Word soon got out that Ryan was building a quality product that was consistently getting wins for its drivers, and business began to pick up. With 15 cars on the track by the end of the 2010 racing season, Ryan knew it was his time to shine in the motorsports industry. Diamond Race Cars was then formed and he leased a facility in Gosport, IN. In 2015, Diamond Race Cars moved to Seymour, IN to be more centrally located with the dirt racing community and near an interstate. After quickly outgrowing that facility, a new facility was built on 5 acres near Brownstown, IN in 2016. Diamond Race Cars has now manufactured more than 200 cars for drivers in 10 different states across the Midwest region.