This package includes four heavy-duty ball joints designed as direct replacements for specific RZR models.Compatible with RZR XP 1000 (2014-2024), RZR XP 1000 EPS Lifter Edition (2015-2024), RZR XP 4 1000 (2014-2024), RZR XP 4 1000 EPS Lifter Edition (2016-2024), RZR XP 4 Turbo (2016-2024), RZR XP Turbo (2016-2024), and RZR XP Turbo S (2018-2024).OE part numbers: KRZRBJ10, KRZRBJ10-PACK.Constructed from iron and rubber, this set includes all necessary mounting hardware.Features include oversized threads on the retainer, heat-treated 4140 chromoly stud, heavy-duty internal components, a serviceable grease port, and enhanced strength and rigidity compared to standard units.Direct bolt-on installation maintains factory geometry.