Bizzarrini P538 drivers Edgar Berney and Andre Wicky, but records indicate both retired after three hours with a cooling problem. A second team in a production-based Bizzarrini A3/C, driven by Sam Posey and Massimo Natili, was disqualified after a pit lane violation, possibly while returning with serious frame damage. American Ferrari driver Mike Gammino then commissioned a Lamborghini 4.0-liter V12 powered car, which he raced once. Bizzarrini attempted to build a second, 3.5-litre V12 car for Le Mans, but was unable to complete it before bankruptcy. Beginning in the mid-1970s and continuing at least through the 1990s, former Bizzarrini engineer Salvatore Diomante
BMW V12 LMR to radically revamp their sportscar project and quickly replace the V12 LM with a new car for 1999, the V12 LMR. The V12 LMR would retain only the basic structures of the V12 LM, while all of the car's bodywork was redone from scratch. The cooling ducts, a major problem on the V12 LM, were moved to the top of the car instead of from the bottom where it had suffered from ambient track heat. Among the more radical design features was the use of a small rollhoop located only behind the driver's seat, instead of a wide rollhoop which