of the 350 GT, Neri and Bonacini continued to supply chassis, which were then bodied by Carrozzeria Touring. As production increased, this task was contracted instead to the firm of Marchesi. Through this pre-existing relationship with Lamborghini, Neri and Bonacini were commissioned to create a one-off two-seater sports car based on a 350 GT chassis (number 01030) and a 400 GT V-12 engine. Possibly built for an unknown American client to race at the 24 Hours of Le Mans, the car was completed in August 1966 and named the 400 GT Monza. The aluminum body was hand built in the Neri and Bonacini shop and went through many revisions during the fabrication process. The final result shows visual similarities to other Italian sports cars such as the Bizzarrini 5300 GT and the Lamborghini Miura, with a long hood and Kamm tail. The 400 GT Monza never raced at Le Mans, possibly due to homologation problems. It was displayed at the 1967 Barcelona Motor Show on the Lamborghini importer Amato's stand. A wealthy Spaniard purchased it at the show and the 400GT Monza remained in his family until 2005, when it was sold at Bonhams' December 2005 auction in London for £177,500 GBP. Studio GT Due Litri In 1966, Neri and Bonacini decided to produce a road car under their own name. The result was the Studio GT Due Litre, a rear mid-engine rear-wheel-drive two-seater coupe sports car with an aluminum body of their own design. The Studio GT chassis was produced in-house and incorporated a central sheet metal tub, steel tube subframes at the front and rear and an original suspension design. Wheelbase measured 92 inches, overall height was 42 inches, and track was 53 inches at the front and 52.5 at the rear. As the Studio GT was intended to be a grand tourer, it had a fully trimmed and soundproofed interior. The body was a compact and sleek fastback, with pop-up headlights on the final version and rear bodywork visually similar to that of the Lamborghini Miura. The car was designed around a 1.8 litre Lancia Flavia flat-4 engine, but a Ford Taunus V4 and an ATS V8 engine were also installed in prototypes for testing purposes as availability of the Lancia engine for series production was uncertain. Neri and Bonacini produced two prototypes between 1966 and 1968. During this period their partnership ended and Giorgio Neri independently