While J.F. Dumoulin only made a single start in 2021, at his home track of GP3R, he made the most of it, finishing runner-up, on the streets of Trois-Rivieres, Quebec. The podium marked his best finish ever in the series.

Since 2007, the eldest Dumoulin brother has made 66 starts over the past 14 seasons and has also won the prestigious Rolex 24 Hours in 2004 (SGS Class) and in 2007 (GT Class).