slammeddime
+1y
Sure, you can do it, but you have to take into consideration a few things. Here is an image from the Firestone design guide...
"STACKING
It is permissible to stack Airstrokes (one on top of another) to
increase stroke; however, the center plate (or plates) connecting
the two or more Airstrokes MUST BE GUIDED.
Please note that the air spring forces are not additive in this
configuration. A method for guiding, which also illustrates one
center ring concept for mounting the two parts together at the
middle, is illustrated below:
"