During 1933-1934, MG produced a special run of 33 six-cylinder supercharged competition cars. These essentially ready-to-race cars were based on the concurrent MG K-series Magnette chassis, and as they followed the K1 and K2 production Magnettes, they were designated K3 models. The K3 Magnettes would standout in the storied racing history of the MG Car Company. In their very first appearance, a trio of works K3s took the team prize at the 1933 Mille Miglia—after having run at up to 110mph during the race. Other significant and important victories followed, none more celebrated than when famed Italian driver Tazio Nuvolari piloted a K3 to victory at the Ulster Tourist Trials.