The renowned 'K3' racer was a direct development of the 'F' type but, even with a supercharger, more power was needed to compete in races such as the Mille Miglia. The factory fitted wider axles to the 'F' type prototype EX129, and production 'K3's also used the wheelbase of the 'F' type, but the smaller capacity 'K' type engine was more powerful with its cross-flow head and other lessons learnt from the 'C' type The 'K3's success is well documented elsewhere but it is interesting to note that Eyston's record-breaking EX135 - perhaps the most famous of all 'K3's - was called the 'Magic Magna' when announced in the press! Richard Seaman and Prince Bira both graduated from 'F' type to 'K3' ownership in their ascendance as racing drivers.
Howe	?	EX135	later	Seaman	Bira