Porsche 917LH #21 was chassis N°043 and it was tested by Jackie Oliver, Jo Siffert and Gijs Van Lennep. This particular car would be driven in the actual 24 hour race of 1971 with # 18 at the hands of Rodríguez-Oliver. Prior to the race, on April 17th and 18th the Le Mans Test Weekend took place in which the following 917´s participated: : two 917K (#17 from Porsche AG, and #18 from the John Wyer-Gulf team) one 917LH (#21) entered by the factory, and one 917/20 (#20) from the Martini Team.