How often do you....

[NotQuik]

It's time to get a cai and a new tune !!

indeed!

 

[40th GT]

Don't worry my speedometer is off 5 mph according to my navigation.

Just curious, does the speedometer read lower or higher than the speed on your navigation?
Because assuming that your gps is correctly calibrated, this could spell trouble if the speedo reads lower. (speeding tickets)