He competed in Formula 1600, Formula 2000, Champcar Light, Formula Renault, Formula Vauxhall Junior, Touring car, Spec Racer, Formula Atlantic, and Daytona Prototypes, and competed at circuits including Silverstone, Magny Cours, Daytona Speedway, Mont Tremblant and Gilles Villeneuve.
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Létourneau served as an expert in the Discovery Channel Canada television series Canada's Worst Driver for seasons Canada's Worst Driver from season 3 to the latest season 8, as well as the Discovery Channel program Star Racer.
Philippe Starck | Louis Philippe II, Duke of Orléans | Philippe II, Duke of Orléans | Philippe Parreno | Philippe Pétain | Philippe Herreweghe | Louis Philippe I | Philippe Pinel | Jean-Philippe Rameau | Philippe Leclerc de Hauteclocque | Philippe I, Duke of Orléans | Philippe Quinault | Philippe Gilbert | Philippe Entremont | Philippe Beaussant | R. G. LeTourneau | Philippe Léotard | Philippe Jaroussky | Philippe Douste-Blazy | Philippe d'Orléans | Philippe de Rigaud Vaudreuil | Philippe C. Schmitter | Philippe Boesmans | Philippe Bercovici | Jean-Philippe Collard | Prince Ferdinand Philippe, Duke of Orléans | Prince Ferdinand Philippe | Prince Charles Philippe, Duke of Anjou | Philippe Troussier | Philippe Saisse |