Keller - POLARIS RZR XP Turbo BALL JOINTA Better, Beefier Ball Joint Keller Ball Joints fix the weakest part of OEM ball joint designthe snap ring. We eliminated that snap ring and replaced it with a threaded chromoly housing that wont push through your arm. If you want a ball joint that can handle big lifts and heavy machines without pulling out, Todd Kellers original two piece design is still the best you can get. So put Keller Ball Joints on your Polaris RZR XP Turboyou wont regret more