Follow up to an earlier post on this thread. Installed a 163 into my 155 tunnel. Changed to 163 Ice Age rails w/8" axle wheels. Track is a Camoplast/Factory issue Series 6, 2.6. Excellent results. Great performer in the snow. More difficult to steer on the trails getting there (to be expected with longer track). Changed from factory to a Kurts Gear down set up. When combined with a 36" front end, it feels more nimble that a bone stock '19 850/163. Very happy !
