[rheavn]

Here is a hint for using the Firestone air bag catalog if you don't know the air spring number. Instead of getting bleary eyed looking through all the different air bags, go to the rear of the catalog and find the cross reference chart for the piston component number--starts on page 219. The piston component number is the four digit number found on the bottom of the air spring. Then compare the piston type number and piston drawing number that are also found on the bottom of the air spring. In my case that eliminated all but five air springs and gave me their catalog page number. I could then do a physical feature and measurement comparison and pick the right air spring model number. Unfortunately I didn't find this out until I was already bleary eyed.