Rear:

1.  Loosen and remove the Aluminum banjo fitting on top of the air-jack.

2.  Loosen and remove upper lock-rings using spanner wrenches.   (In order to break them free, turn the top ring counter clockwise, and the bottom clockwise; If you have any difficulty, tap the lock rings with a hammer while trying to break them free)

3.  One side at a time, jack the car up using a floor jack underneath the rear jack points.

4.  Pull air-jacks out from the bottom.

        Front:

1.  Loosen and remove the Aluminum banjo fitting on top of the air-jack.

2.  Loosen and remove the upper lock-rings.

3.  Using a floor jack raise the front of the car up 1 to 1.5ft in the air. (on the 964's and 993's use front jack point on either side, on the 996's use the driver's side front jack point)

4. Pull the air-jack out from the bottom.

Installation is the reverse of the aforementioned