80 MPH is 3900 RPM.
I don’t generally travel at 80, but I would like to see the Tach
something closer to lower 3 Thousands
I’m interested in either changing the rear end gearing, or swapping in
a manual 6 speed. I would like to know the cruise RPM of 6 speed stick..

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2003 4.6is X5
2003 525it
2003 E53 X5 Standard shift