UTV Wolfpack 4340 Chromoly Factory Replacement Heavy Duty Ball Joint Polaris RZR Enhance the durability of your ball joints by upgrading to these heavy-duty 4340 chromoly ball joints, which eliminate a common point of failure. These ball joints can easily replace the factory ones and fit seamlessly into the existing arms. With a strength up to three times that of OEM ball joints, they offer superior performance and reliability. Features: 4340 Chromoly Replace the factory ball joints and go into the factory arms Up to 3x stronger than OEM Sold each