You can look it up on the NAPA website, but as I found out with a WIX hydraulic filter for my 843, it was a replacement for the original part number and Bobcat updated the part number. In my case it was for the hydraulic filter in the engine bay. The correct Bobcat was longer by inches than the WIX. You probably have two hydraulic filters also. I looked at NAPA also and they were slightly higher than Bobcat. The local Bobcat dealer is giving me 5% off. If I were you I would get the CURRENT Bobcat part numbers and either get those filters or cross reference a NAPA filter to those numbers rather than look it up in the NAPA guide by model. For me the hydraulic filters were slightly over $100 (for both).