Ferrari History: The early 1970s saw the return of success to the Scuderia. Jacky Ickx returned and was joined by Clay Regazzoni. A Flat-12 engine, colloquially referred to as a "boxer", was developed for use in the new Ferrari 312B, giving a lower center of gravity. During the design's first season, in 1970, Ickx battled with Lotus's Jochen Rindt and won 3 Grands Prix. In 1972, Ferrari 312PB, a Group 6 Prototype-Sports Car, won all World Sportscar Championship races in which it participated. Thanks to the partnership with Fiat, Ferrari could afford own extreme race cars circuit located in Fiorano.