Stage 2 kit

Was curious into getting the stage 2 clutch kit I believe it is? My buddy told me to take it to the dealership and just tell them I wanted a stage 2 kit and they would know what I was talking about. Few questions though, will I need to do anything else to it? How fast can I expect to go with this kit? And about how much will it run me? I want to make my rzr faster in the top end and I was told this is the way to go… I’m basically bone stock right now except for the high lifter springs. Let me know please, pros and cons etc.