All Balls leading technology 8-Ball Extreme Duty axles are up to 40% stronger than OE axles. These complete axles feature enlarged CV joints, bearing cages, and chromoly axle shafts. All internal components are precision ground and utilize molybdenum grease. 
8 Ball AB8-PO-8-404

Rear Left / Rear Right Fitment:

• Polaris RZR XP 1000 16
• Polaris RZR XP 1000 17-19
• Polaris RZR XP 1000 20
• Polaris RZR XP 1000 Dynamix 19
• Polaris RZR XP 1000 High Lifter 16
• Polaris RZR XP 1000 High Lifter 17-21
• Polaris RZR XP 1000 LE 20
• Polaris RZR XP 1000 Premium 20-22
• Polaris RZR XP 1000 Ride Command 17-19
• Polaris RZR XP 1000 Sport 21
• Polaris RZR XP 1000 Sport 22
• Polaris RZR XP 1000 Trails & Rocks 17-21
• Polaris RZR XP 4 1000 16-19
• Polaris RZR XP 4 1000 20
• Polaris RZR XP 4 1000 Dynamix 19
• Polaris RZR XP 4 1000 High Lifter 17-21
• Polaris RZR XP 4 1000 Premium 21
• Polaris RZR XP 4 1000 Ride Command 18-19
• Polaris RZR XP 4 1000 Sport 21