The 3500 came as a coupe or spyder using a Giulio Alfieri developed 350S race car motor - inline six cylinder 3482cc, 220 horsepower at 5500 RPM - in a 2600mm wheelbase steel chassis. Weber carburetors were superseded by Lucas direct fuel injection in 1961. ZF's four-speed became a five-speed in the same year.
Series production, Maserati's first real attempt, started in late 1957 after a launch at the Geneva Salon in March. It was successful by any measure. By 1964 some 2000 plus cars had been built of which 1973 were the aluminum 'superleggera' bodied by Carrozzeria Touring, and 242 the spyder from Carrozzeria Vignale. The remaining cars were special bodies from a variety of coachbuilders.