Complex sentence: During his career he penned many successful cars, including Jaguar's Le Mans-winning XJR-9, and designed cars almost every type of circuit racing, as well as being responsible for the chassis design for Ford's RS200 Group B rally car.
Split into simpler sentences: During his career he designed many successful cars, including Jaguar's Le Mans-winning XJR-9, and cars for almost every type of circuit racing. He was responsible for the chassis design of Ford's RS200 Group B rally car.