Speedo question , my FD original JDM car has came with a gauge face in KM/h but it only goes up to 180 but I've seen that the MP/h are the ones that go up to 180 is there any explanation for this please
thank you

 

Japanese law to limit vehicle’s max speed.

 

Is it possible to converte it to normal speed or better saying to the 280 km/h or 180 m/hThanks