Peter Broeker, the owner and president of a firm of automotive accessory manufacturers, designed and built the Stebros in his Montreal plant, to promote the company in the Canadian market. A Stebro Formula Junior chassis, fitted with an enlarged Ford 105E engine appeared in one Formula One Grand Prix, the 1963 United States Grand Prix. The engine, including a Hewland gearbox, was the only alteration, with the Weber Ford 1,500 c.c. engine developing . The car was driven by Broeker and, against the more powerful Formula One cars of the day, finished in seventh place, completing 88 of the 110 laps. Broeker's Stebro later won the all-formula sprint at the Indian Summer Trophy races at Mosport on September 4, 1965.