42DCOA/3, output remained the same at 220 PS, which was enough for a third place at Le Mans. Applications: 624.39 cc 1954 Ferrari 553 F1 1955 Ferrari 555 F1 624.58 cc 1951 Ferrari 625 F1 1953 Ferrari 625 TF 1956 Ferrari 625 LM 1957 Ferrari 625 TRC 735 A big-bore version was also produced and implemented in 1953 735 S. Displacement was now 2.9 L (2941.66 cc) with 102 mm (4 in) of bore, though the 90 mm (3.5 in) stroke was retained. Output nudged up to with two Weber 50DCOA carburettors. 750 For the 1954 the bore of the Lampredi I4 was nudged up to 103 mm (4.1 in) for the 3.0 L (2999.62 cc) unit used in the 750 Monza. Engine was a development of a Type 555 I4. Dual Weber 58DCOA/3 carburettors pushed out . 857 & 860 For 1955, the Type 129 engine debuted in the 857 S. Bore was the same 102 mm (4.0 in) as the Type 735, but stroke was now for a total of 3.4 L (3432 cc). At the 1955 Targa Florio, the 857 S came third overall, driven by Eugenio Castellotti. Same engine type as in 857 S, was later used in the 1956 860 Monza with two Weber 58DCOA/3 carburettors and . These cars placed first and second at Sebring and came second and third at Mille Miglia that year. Applications: 1955 Ferrari 857 S 1956 Ferrari 860 Monza I6 306 S In 1954 Ferrari produced its first inline-6 engine. Aurelio Lampredi designed a prototype Tipo 114 engine for the experimental 306 S sports car that never raced. The internal measurements were identical to the 500 Mondial engine. 376 S A bigger Tipo 118 version was installed in the short-lived 376 S sports car (also known as 118 LM) converted from 306 S chassis in 1955. It used the same bore and stroke and as the original Lampredi 625 F1 inline-4 engine, it was extrapolated from, and produced at 6200 rpm with three Weber 58DCOA/3 carburettors. 735 LM Later same year 735 LM (also known as 121 LM or 446 S) was created, intended for 1955 Le Mans, this time named from its unitary displacement, the same as on the 735 S engine from which its dimensions were drawn. Lampredi modified the bore of the 376 S with for the 735 LM Tipo 121 engine. Displacement was . Triple