Front disc brakes, a limited slip differential and Borrani knock-on wire wheels are available for 3500 GT as an optional equipment. Carrozzeria Vignale produced a spyder, based on a design by Michelotti.
Giulio Alfieri decided that it made more sense to modify and reinforce the chassis of the 3500 GT rather than modifying the chassis of the 450S racer, after all the components of the 3500 GT were already tried and tested. While Reza Khan Pahlavi, the Shah of Persia was taking delivery of his 5000 GT (#103.002) in Teheran, Maserati were diplaying a similar 5000 GT 'Scia di Persia' (#103.004) at the Salone di Torino. This car was purchased by Basil Read, a South African businessman. Two 5000GT were built this year – both with Touring bodies. The first two 5000 GTs were powered by an engine virtually identical to that which powered the 450S race car the only modifications made were a reduction in the compression ratio from 9.5:1 to 8.5:1 and a slightly larger bore (93.8 mm to 98.5 mm), resulting in an engine capacity of 4935 cc against 4477.9 cc for the 450S. These changes reduced power output from 400 bhp @ 7200 rpm to a more civilised 340 bhp @ 5500 rpm.