Maserati A6GCM (1951–53) were twelve 2-litre single-seater («M» for "monoposto") racing cars (160-190 bhp), developed by Gioacchino Colombo and built by Medardo Fantuzzi. The A6 SSG (1953) was a GCM-revision pointing to the Maserati 250F. It won the 1953 Italian Grand Prix driven by Juan Manuel Fangio.