[rheavn]

Bob,
In an unbelievable stroke of genius Firestone decided to put the part number on a paper label & place it on the top surface of the air springs where it can be damaged.  If no one knows which air springs fit your coach and you do not want to remove one & hope that the paper label is readable, your choice is to take measurements and do a comparison with the Firestone air spring catalog.  Pay close attention to mounting holes and inlet size.  If you look hard enough you will find it.   I removed mine to verify the numbers. Unfortunately one had a damaged label so I had to go to the catalog research method. Good luck..................................

http://firestoneip.com/-/media/www/fsip/..._smweb.pdf