Ever since the 1K came out, my first thought was "will that dual exhaust fit my 850!?" Well the answer is yes. I put a stock 1k dual exhaust on my 13 850. Not the easiest project but not very hard either. Parts needed are obviously the 2 cans and cross-pipe, left side hanger with grommets, and the 1k CVT outlet pipe. There are a bunch of extra heat shields that the 1k gets that the 850 doesn’t have but I made my own out of reflective dynamat as the heat shields would have added well over $120 to the swap. Newer 850’s the swap is a little easier since the frame is already drilled for the second mount. On my 13 I had to drill a couple holes to mount the left hanger. You also need the 1K CVT outlet because the 850 outlet goes in exactly the path of the exhaust cross-pipe. Overall, I’m very happy with the swap. Sounds nice but don’t really feel anything on the butt dyno. Just love the way it looks.