In 1913, the new type Y set the fastest lap time at the French Grand Prix at Le Mans, and in 1914, this same car won the 1914 Indianapolis 500 with René Thomas at the wheel. Thomas, Guyot, and Duray returned to the French "Grand Prix" with 4½-liter twin-cam desmodromic valved racers featuring twin carburettors, five-speed gearbox, and four-wheel brakes. While quick, they proved unreliable; only one finished, Duray's, in eighth.