I6
For the 1955 735 LM, Lampredi modified the big-bore 1953 I4 into a straight-6. Displacement was 4.4 L (4412 cc) from 102x90 mm cylinders. Triple Weber 50 DCOA/3 carbs pushed out 300 to 350 hp (261 kW). With this power, the 735 LM could hit 280 km/h (174 mph) on the Mulsanne Straight at Le Mans.
A smaller version was used that same year in the 376 S sports car. It used the same 90 mm (3.5 in) stroke and 94 mm (3.7 in) bore as the original Lampredi Formula One engine and produced 280 hp (209 kW).
Read more about this topic: Ferrari Lampredi Engine