24 Hours of Le Mans
Manfred Schurti / Rolf Stommelen, Martini Racing Porsche System, Porsche 935/78 leads Bob Wollek / Jörgen Barth / Jacky Ickx, Martini Racing Porsche System, Porsche 936/78 , Didier Pironi / Jean-Pierre Jaussaud, Renault Sport, Renault-Alpine A442B and Hurley Haywood / Peter Gregg / Reinhold Jöst, Martini Racing Porsche System, Porsche 936/77 - Porsche 911/78