LMP3 beginnings (2016–2021) After leaving single-seaters on a full-time basis following his V de V title, Droux joined
Duqueine Engineering to compete in the LMP3 class of the
2016 European Le Mans Series. Despite winning the 4 Hours of
Red Bull Ring, Duqueine was given a four-second penalty for not respecting minimum pit stop times, giving the win to
United Autosports and sending the Duqueine team back to second place. Despite starting off the season with a pole and a podium at
Paul Ricard, Droux wasn't able to score another top five for the rest of the season, finishing tenth in the standings at season's end. In 2019, Droux joined Realteam Racing, partnering
Esteban García. At
Monza, Droux finished fourth, which would turn out to be his best finish of the season as he concluded the season seventh in the standings. In late 2019, Droux made his debut in the
Asian Le Mans Series, staying in the LMP3 class and joining
Graff Racing alongside Eric Trouillet and Sebastien Page. Droux scored his first LMP3 win in an ACO-sanctioned championship at the 4 Hours of Sepang. Droux stayed with Realteam and Garcia for the
2020 season. In his fifth season in the category, Droux scored his first win in the series at
Paul Ricard from pole and ended the season third in points. Ahead of the
2021 season, Droux returned to
Graff Racing along with Sebastien Page and Eric Trouillet. Droux scored his only podium of the season at the
Red Bull Ring, finishing third in wet conditions.
LMP2 debut and LMP3 return (2022–) In early 2022 Droux stepped up to LMP2, staying with
Graff Racing for the
2022 Asian Le Mans season. In the four-race season, Droux finished on the overall podium in every race and won the LMP2 Am title at season's end. Droux remained with
Graff Racing for the
European Le Mans Series. Only competing in the first three races of the season, Droux also made his maiden appearance at the
24 Hours of Le Mans, finishing seventh in LMP2 Pro-Am. Towards the end of the 2022 season, Droux returned to LMP3 competition, racing in the final two rounds of the Michelin
Le Mans Cup, winning on his return at
Spa. Droux stayed in
Le Mans Cup for 2023, joining
Cool Racing, alongside Luis Sanjuan. At the second round of the season at
Le Mans, Droux finished third in race one and took his only win of the season in race two. Staying with
Cool Racing for the 2024 season, Droux was joined by Adrien Chila for his second full season in the series. Despite only taking one win, in the second round of the season at
Paul Ricard, won the LMP3 title at the final round of the season, beating out
R-ace GP by 5.5 points. Ahead of the 2025 season, it was confirmed that Droux would stay with the newly-rebranded
CLX Motorsport alongside
Cédric Oltramare. In his third full-time season in the series, Droux won the season-opening race in
Barcelona and finished second at
Le Castellet en route to a sixth-place points finish. The following year, Droux returned to
CLX Motorsport for his fourth full-time season in the
Le Mans Cup. ==Karting record==