Thor changed the hitch ratings (er started to install the 8000 lb hitch) a few years ago (like in 2015 or 2016). I know this because our Axis only has the 5000 lb hitch and we missed the 8000 lb hitch by about a year. (At least for the Axis/Vegas lines--not sure about the others; thought they all went to 8000lbs at around the same time.)
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