Along with his brother Jean-Baptiste, he runs a small sports car racing team called Ultimate.

In 2009 he continued with the team (now renamed OAK Racing) in the LMP2 class of the LMS, with Karim Ajlani as his teammate.

Lahaye did win the class in the two races at Okayama that made up the 2009 Asian Le Mans Series, partnering team owner Jacques Nicolet and Richard Hein.

[2] In 2012 he is competing in the FIA World Endurance Championship in OAK's Morgan LMP2 alongside Nicolet and Olivier Pla.

[3] (key) (Races in bold indicate pole position; results in italics indicate fastest lap) * Season still in progress.