For 1975 the 308 was updated to 308B specifications, with revised bodywork and repositioned oil radiators. The car was even more competitive and Hunt challenged for the victory in Argentina and Brazil before he broke his and the team's duck at the 1975 Dutch Grand Prix. It would be the team's only win however. He rounded off the season with several solid placings, which helped Hesketh finish fourth in the constructors' championship. The team folded at the end of the season as Hesketh could not afford to keep financing his unsponsored team, and Hunt moved to McLaren for 1976.