For a period after the war, the Panhard-based Monopole racing cars received unofficial support from Panhard (as did DB and other clients such as Robert Chancel), using it to good effect in winning the "Index of Performance" class at Le Mans in 1950, 1951, and 1952. In 1953, Panhard moved on to a more direct involvement with Chancel, which however came to an end after the deadly 1955 Le Mans. In the latter half of the 1950s and the early 1960s, the Deutsch Bonnet racers ("DB Panhard") picked up this mantle and went on to dominate the "Index of Performance" as well as other small-engine racing classes.