Super ATV's Heavy Duty Ball Joints are extremely durable and will give your RZR the ultimate strength. These Ball Joints are 4340 chromoly steel studs that have been hardened with a unique heat treating process that is nearly double the strength of OEM Materials! Combined with a zinc plating and a stud necked down less than OEM you can be sure these ball joints will hold up for any type of terrain. Don't be stressing that these won't hold up for you, have a peace of mind and just focus on ripping up the trails! Upgrade your Polaris RZR XP 900 with Super ATV Replacement Ball Joint today!! - Our Super ATV Replacement Ball Joint generally ships out within 1 business day! - Fits: Polaris RZR XP 900 : 2011-2014 / RZR XP 4 900 : 2012-2014 - Durable Ball Joints - Pre-Adjusted insert gives you teh option to control stud tightness and service ball joint - Ball Joints are sold Individually -Stud Thicker than Stock at Base -Stronger than Stock -Made with 4340 Chromoly Steel -Can Withstand 25,000 lbs of Force Manufacturers Part Number : BJ-1-001