Best performance thing you will do to that sled is a HOLZ ALPHA-X rear skid and some decent front shocks. You already have some quality add's for your engine. Now tie that to the snow.
Trust me this is my field of expertise. The sled will weigh less but most importantly it will respond and perform better in all conditions. Your suspension is a function of your transmission. This suspension uses the power of the vehicle better than any suspension I've tried. It's also very versatile and that is it's other great advantage over the competition. Good at all conditions not just great at some and wanting in others. You see the hub bub about the PRO. What suspension does the PRO run? A copy of this HOLZ suspension. The Alpha-X is light years ahead of the stock coil spring setup for that sled. I ran the very first one on an IQ RAW chassis and it made that sled outstanding. Once you dial your preferred setup it's a very impressive performance tool.
big bonus plus'
lighter than stock
geometry allows the sled to pop on plane quicker
infinite suspension adjustments for sled, rider, and power variances