The Hot Rod division, which receives backing from Knightworks Design, draws many competitors and features some exciting races. The 2021 season was scheduled to kick off in May with an event at Sunset Speedway. However, as the outbreak of the COVID-19 virus continued, adjustments would have to be made to the racing calendar.

The 2021 OSCAAR Knightworks Hot Rod’s season begins in late July at Sunset Speedway with the first of three visits. Two weeks later, the teams return to Sunset. In mid-August, the Hot Rods will compete at Brighton Speedway, which is followed by events at Sauble Speedway and Peterborough Speedway. In September, the series makes its final visit to Sunset. Round six is conducted at Delaware Speedway. The penultimate event is at Flamboro Speedway, with the finale taking place at Peterborough on the Thanksgiving Weekend.

The cars competing in the championship are constructed to specifications and rules common to most stock car series. What makes the Hot Rod division unique are the makes and models that compete in the division. The cars must be North American, have a steel body and been in production between 1949 and 1974. No pickup trucks, convertibles or front-wheel-drive vehicles can participate in this series. The Hot Rods must have a stock roof, grill, tail and the rest of the body panels can be fabricated from 22-gauge sheet steel but must retain a stock appearance. Many of the other rules governing this class are for safety and to keep the costs down.

The opening round of the 2021 Knightworks Design OSCAAR Hot Rod Series was held at Sunset Speedway on July 25. The results from six heat races on the 0.333-mile asphalt oval would determine the starting order for the thirty-five-lap feature event.