Multi Valve Per Cylinder: 2V, 4V, 5V, 6V & 7V

The need for more valves per cylinder was quickly found in race cars when first manufacturers found out that it can significantly boost output of their engines. The first 4V engine basically came over a decade ago and became the standard in road cars not a long time after that. The progress did not stop there and more valves were tested for any possible further power improvements, especially by Maserati, Audi and Yamaha. - Vlog - - Support -