I'll NOT post the link unless you change your attitude. :o
--Off Topic--
You did type your entire post in capitals which is actually shouting.
"Typing in all capital letters on the Internet is considered rude because it is difficult to read and comes across as very aggressive (LIKE SHOUTING!)." - http://www.simplehelp.net/2006/08/14/how-t...ood-netiquette/
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On topic, yes you would have to replace the whole tach because you can't change the MPH to KPH there however i'm not sure about changing the readout from the trip computer (this could probably be done by software however i'm not sure what's involved or whether it's even possible without getting a new unit).
Thanks Camski!
As expected the guy / girl never replied with the imaginary link to the imaginary gadget :)