The Porsche 911 Carrera RSR 3.0 was a race car built by Porsche. In 1974, the RSR's 2.8L flat-six engine's displacement was increased to 3.0L, which resulted in a power output of 330 bhp. It participated in several prestigious motorsport events during the 1970s such as the 24 Hours of Le Mans between 1974 and 1978.