Repair Your Diff Your Polaris RZR is built to push hard and deliver action-packed rides every time. All that action will eventually wear down your front diff™s seals and you™ll start losing oil. And no oil leads to a busted diff. Before that happens, you need to replace them with SuperATV™s Front Differential Bearing and Seal Kit. You get hub seals, an input seal, and an option pinion bearing to make sure your front diff runs like new. Durable Parts The seals in this kit are double-lipped to ensure long-lasting protection from dust and water penetration. They™re tough enough to keep everything running smooth. Plus, with the option to add a pinion bearing, you can take that protection even further. Add a Pinion Bearing When you add a double-row angular contact pinion bearing, you™re adding strength to your drivetrain for years to come. Plus, if your OEM seals failed already, your stock pinion bearing probably needs replaced anyway. Replace it with strength and durability you can count on. KIT INCLUDES (2) 52 mm ID hub seals (2) 30 mm ID hub seals (1) Input shaft seal (1) Pinion bearing (optional)