Find My Fit — Match Your Apparatus
Fuel door fitment is set by the chassis cutout, not the body builder. Pick the chassis under your apparatus and we'll show the vault sizes with verified fitment records.
Select your chassis
The chassis is stamped on the driver's door jamb sticker or your build sheet — look for the manufacturer and series, not the apparatus builder name.
Not sure which chassis you have? Send us a photo of your fuel door and the door jamb sticker on the contact page and we'll confirm it for you.
How fitment is determined
Chassis, not body builder
Pierce, E-ONE, Braun, Horton and every other builder mounts their body on an OEM chassis. The fuel door cutout comes from that chassis, so that is what fitment follows.
Two measurements decide it
Height and width of the fuel door opening determine whether you need the small or large vault. Everything else — mounting, hardware, finish — is identical.
Verified before we publish it
A chassis is only marked verified after a real installation has been confirmed on it. If yours is not listed yet, we measure it with you rather than guess.
Still Not Sure Which Vault You Need?
Send us your chassis and a photo of the fuel door. We'll confirm the right configuration before you order a single unit.