While I don't know the specifics for the snowmobile world, I do know that in the world of motorcycles, k&n is the best. They will pretty much last forever, they don't need to be cleaned very often. I'll do mine once a year, and can be done with just soap and water. Spray on a little k&n oil and you're good to go. They may affect your jetting so check that after installing one, as they do flow more air. I would think a pre charger would be good for the snow, but I'm not sure.