Chassis #3502 (second) was rather similar to the first, to be bought by Luigi Piotti. Engine output was 325 bhp (242 kW) at 6200 rpm. It was bought by Tony Parravano in 1957, and sold to Connecticut in 1974, where it still resides (2004).
Chassis #3503 (third) came early 1957. It first used the straight-six, but was converted to 3.5-litre V12 engine (335 bhp (250 kW) at 9000 rpm). It also had a five-speed developed for the Maserati 250F. Engine failure caused it to never be Hans Herrmann in the 1957 Mille Miglia. It was later entered by Luigi Piotti and Roberto Bonomi in the Buenos Aires 1000 km (1957). The car resides in Belgium (2005), although a second of same chassis #3503 is said to have existed.