Wow, I'm new to snowmobiling are they a big player in the game or just some ma and pop shop? The port work looks amateur at best. Looks like several flat spots in the port that will create allot of low pressure areas causing turbulence(loss of flow).
There is no reason in that short of a runner to have a knife edge divider. You will lose flow by doing that and cause more turbulence. Sorry to jack your thread, just trying to make conversation.