In 1973, the first racing project of the newly formed Mugen Co. Ltd. was the MF-318. Based on the Civic EB1 Civic 1200 engine features dry sump lubrication and Keihin 35mm CV carbs to make 135 ps at 8000 rpm. It was very successful race engine in both formula car and sedan racing. The team at Mugen completely remade or modified every aspect of this engine. Boring the engine to 1300cc, the Mugen MF-318 was victorious in its very first race in the Formula FJ 1300 racing series in Japan. It went on to become the dominant engine in this series for many years to come.

Here is a very rare picture of the Mugen FJ 1200 race car. Pictured here in 1973 at the first Mugen HQ.