Long story short: completely stripper the hex slot on the back of the freehub body while trying to remove it. It’s incredibly tight. Can I just take a pipe wrench to it from the front or do the teeth seen here on the new part lock with the wheel hub making it impossible to turn?
Yeah I think I’m just going to disassemble the new one and move all the parts onto the old freehub body. There’s no way I’m getting this one off without messing up the wheel hub. If correct size allen key and a 2 meter long cheater bar didn’t get it to budge I don’t think the torx method or a screw extractor is going to work either.