ok, im installing my white face gauges and i did not remove the needles for it. do i still have to worry about a calibration problem?

 

As long as the inlay matches the stock numbers and tick marks correctly, and you didn't remove the needles then no you are fine, no need to re calibrate them.

ive installed them in friends car we normally go down the road them in there car and me in mine, with the cell phones checking to make sure speeds are correct, but the ones ive put in have been inports and I have had to take the needles out.