Ferrari 512BB/LM 306 Ferrari 4.9L Flat-12 10 C 25 Primagaz Pierre Yver Bruno Sotty Lucien Guitteny Rondeau M379 306 Ford Cosworth DFV 3.0L V8 11 IMSAGTX 77 Garretson Developments Anne-Charlotte Verney Bob Garretson Ray Ratcliff Porsche 935 K3 299 Porsche Type-935 2.8L Turbo Flat-6 12 Gr.5 66 Jean-Marie Lemerle Sivama Motor Jean-Marie Lemerle Max Cohen-Olivar Joe Castellano Lancia Beta Monte Carlo 295 Lancia 1.4L Turbo I4 13 Gr.4 90 Richard Cleare Racing Richard Cleare Tony Dron Richard Jones Porsche 934 293 Porsche 3.3L Turbo Flat-6 14 IMSAGTX 82 Mazdaspeed Co. Ltd. Yōjirō Terada Takashi Yorino Allan Moffat Mazda RX-7 282 Mazda 13B 1.3L 2-Rotor 15 C 38 Bussi Team Christian Bussi Pascal Witmeur Bernard de Dryver Rondeau M382 279 Ford Cosworth DFL 3.3L V8 16 IMSAGTO 87 B.F. Goodrich Jim Busby Doc Bundy Marcel Mignot Porsche 924 Carrera GTR 273 Porsche 2.0L Turbo I4 17 IMSAGTO 81 Stratagraph Inc. Billy Hagan Gene Felton Chevrolet Camaro 269 Chevrolet 5.7L V8 18 Gr.5 61 Total S.A. Roland Ennequin Michel Gabriel Franco Gasparetti BMW M1 Gr.5 ?