The Ferrari 735 LM (also known as the 121 LM) was a sports racing car produced by Ferrari in 1955. The 735 LM was developed to compete in the 1955 24 Hours of Le Mans race which Ferrari had won with the 375 Plus a year earlier. Enzo Ferrari had firmly believed in engine power to win at racing, therefore the 735 LM with its new 4.4-litre engine, was designed to outpower the competition. In the practice trial for the 24 Hours race, the 735 LM was the fastest. The enlarged engine was identified as the Tipo 121, hence the common "121 LM" name of the car. A total of 4 were produced.