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I have a 2010 sportsman 550xp. I'm getting ready to 1st oil change on it. I went to my dealer and bought the oil change kit. The oil filter in the kit has 2520799 as the part #. I took the new filter to the local parts store and bought a wrench to fit it. When I got home and checked the wrench to the filter on atv, the wrench is too small. I called my dealer and he said that the new filter is the correct one. I did some checking online and my new filter has the correct part #. My question is this, should there be a difference in the size of the filter that came from the factory and the new one that I bought?
 

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Yes, the 550 and 850 filters use to be different sizes. They the changed that, and the 550 started using the 850 filters and they completely dropped the old 550 filter sizes. That's probably the reason you are having this issue.
 
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