guys, thx for all your inputs, but it is not the air cells that i have a question about...i guess the title of my original post was misleading...

read my original post if you would....

I am asking about spring pads or spring shims, or spring spacers for the self leveling suspension - whether it is a valid maintenance item to replace such spring pads during the time the air cells are being replaced.

sorry for the confusion, but i hope i have made myself clear!!!!