Friz and his team of engineers design the first "boxer" (or opposed twin) engine was the fore-and-aft M2B15, based on a British Douglas design. It was manufactured by BMW in 1921/1922 but mostly used in other brands of motorcycles, notably Victoria of Nuremberg. The M2B15 proved to be moderately successful and BMW used it in its own Helios motorcycle. BMW also developed and manufactured a small 2-stroke motorcycle called the "Flink" for a short time. When BMW Gmbh went public in 1922, Friz was named the first Chief Engineer and Design Director of BMW AG, a post he would hold until 1937.