Stebro was a Canaian constructor of Formula Junior racing cars. A Stebro FJunior fitted with an enlarged Ford 105E engine appeared in one Formula One Grand Prix, the 1963 United States Grand Prix. The car was driven by Peter Broeker and was lapped many times by the true Formula One cars, but in a race of attrition finished seventh (and last), 22 laps down on the winner. Stebro therefore qualifies as a Formula One constructor.