I just picked up a very nice 03 sportsman 700 twin. I ride modified 2 stroke scramblers but picked this up to push snow and play in the mud. I am a little disappointed by the power of this brute so I decided to add the 800 header with pure polaris slip on. I will also be adding the 800 snorkle with a uni filter. I found some great posts on actually doing the conversion but I haven't found any info on what jetting changes are being made. As of now I have done the pipe mod but haven't changed the intake stuff yet. My jetting should still be stock though I haven't verified this yet and it seems to run fine with a slight boost in low end power. I am curious to hear from those that have done this mod as what their final setting were.