The Ferrari 412 P was a limited production customer version of the famous 330 P3 factory race car, built for independent teams like NART (0844), Scuderia Filipinetti (0848), Francorchamps (0850), and Maranello Concessionaires (0854). A total of 4 are known to have been produced. However, only two of those cars were originally built as 412 Ps: 0850 and 0854. The other two, 0844 and 0848, were originally 330 P3 Factory Race cars that were "converted" to 412 P's when Ferrari sold them to the independent teams. The conversion consisted of removing the Lucas Mechanical Fuel Injection and replacing it with Weber carburetors which reduced their output. All samples had the same 4-liter block.