Well I would not reccomend setting the car up to sit on the internal stops when it is slammed........The correct way would be to set the car up at ride height usually 4in or so! the ride hieght on most bags is anywhere from 5 to 8 inches depending on which bag it is (2500to2600series)

That being said if your ride hieght is 4 and your bag is installed at 8 then when the car is layed out and the frame is on the ground you will not hurt the bags because they will not be totally deflated!

2600 collapsed 3in, ride hieght 8 to 8.5in, extended lenght 12in