 After retiring from racing following the death of his friend Jo Schlesser, Guy Ligier decided to found his own team and had engineer Michel Tétu develop a sports car named JS1 (Schlesser's initials).The Cosworth-powered JS1 took wins at Albi and Monthlery in 1970, but retired at Le Mans and from the Tour Automobile de France.For 1971, Ligier had the JS1 developed into the JS2 and JS3.