Amsoil has engine oil filters for a lot of Kubotas, top notch but they are not cheaper than the OEMs. I was not able to cross reference the hydraulic or trans filters for my L3410. I was able to determine that the Kubota hydraulic filter was only rated nominal (60%) at 60 microns. That is pretty sad. I added a low pressure hydraulic filter right before the cooler that has a 10 micron rating (probably nominal also).