Off my 300 i have for sale a turbo timer which was on it from Japan.
It worked differently to my brothers turbo timer. This one counts up depending on how hard and how long you have driven the car.
Mine is model 4753 which i can't find much infor on but here is a link to the newer version 4754.
original site:
http://www.nagaidenshi.co.jp/TIMER/4754.shtml
Translated site:
http://www.microsofttranslator.com/B...R%2F4754.shtml
I don't have any install instructions for the turbo timer.
In the country they cost about