Moose Racing Heavy Duty Rear Axle Polaris General / RZR Moose Heavy-Duty Axles are a direct-fit replacement CV axle shaft that exceeds OEM quality in fit, form and function. Moose Racing axles are the industry leader in toughness. A solid chromoly center shaft, heat-treated joints, bearings and cages exceed the durability of stock hardware by 35%. Half shafts arrived with joints assembled and lubed for quick, easy installation.  Features: Heavy-duty replacement axle shafts that exceed factory specifications  Up to 35% stronger center shaft, bearings and cages than OE Solid chromoly steel center shaft Heat treated joints Industry-leading CV axle quality, reliability and toughness Tested to failure and engineered under most rigorous conditions Pre-assembled with heavy duty, high temp moly grease Sold each Note: Images for reference only, and product may vary depending on make and model of vehicle.