I was looking at a used BX25 at the Kubota dealers lot yesterday, and I looked at the mower deck, and aside from the plastic covers vs. the metal covers on my 60" BX22 deck, it looked the same as mine. I think that the only way that you will actually know for certain is if you attempt to mount it onto your tractor. It is like the new snow blower for the BX23S, the dealers say that it wouldn't fit an older machine or vice versa, however, if you change out the mounting part that attach it to the tractor, all the rest of the parts will interchange. The dealers are in the business of selling new tractor accessories, and it is rare that they will go out on that limb and say that with the changing of a few items, it will work.