In 1971, Ferrari shifted focus from the 512M to develop a new 3 Litre prototype, the 312P, based on the 312B F1 car, in response to rule changes for 1972. The 312P, initially fast but unreliable, debuted at the 1971 Sebring 12 hours and gained reliability throughout the season. Ferrari’s records refer to it as the 312 P, although the press often added a "B". The 312Ps, powered by flat-12 boxer engines, dominated the 1972 World Championship for Makes, winning ten out of eleven races and securing the title for Ferrari. Ferrari opted out of the 1972 24 Hours of Le Mans, doubting the F1-based engine's endurance capabilities. In 1973, the team finished second at Le Mans and in the championship, with Matra taking the win. Following the 1973 season, Ferrari, under FIAT's directive, ceased sports car racing to concentrate on Formula 1.
Enzo's Legacy is an interactive timeline of all Ferrari models ever made.