154 xm turbo to 165 "expert" swap. Rail fitment?

Dec 20, 2008
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Project sled this year.
16 summit sp 154. 2.5 lug
Rasmussen post forward and gripnrip bracing.
Picked up a silber turbo setup.
Looking to put on a longer track.
Anyone know the differences in the xm 163 rails and the gen4 165. I would rather go the 165 route. I had a look at my buddies 18 freeride rails and the mounting points took to be similar.
I have heard that the newer 19 and 20 rails dont have as much angle up as the older rails giving them a better angle for deep snow starts.
I ride the sierras, mostly deep/high moisture content. The back yard is tech steep, trees
 
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