I was just curious if anyone has any knowledge of using aftermarket air filters. I have a 2002 700 RMK and I've heard of people gutting the air box. And I could somewhat see that the air has to make so many turns before it get to the carbs. Would K & N air filters be that much improvement? Does a person need to rejet? I'm just looking to get the most out of my sled. And plan on doing other upgrades also, pipes, reeds, clutch.