Super ATV has done it again, with great products that you can't get anywhere else! This Complete Differential is the only aftermarket kit for Polaris on the market! You may be asking yourself.. Why not just buy an OEM kit? These Super ATV Kits are stronger and better built than Polaris! These are designed to deliver power to your front wheels and lock when you want it to. This isn't just an OEM replacement, this is a step up and is built for battle. This will hold up even with the most insane riders. This complete kit is all put together ready to install once you get it. You get a whole new heavy-duty cast or billet aluminum case, thicker gears, bushings, seals, hubs, Sprague, armature, and wiring. To make it even stronger and next level, we use 7075-T6 aircraft grade aluminum for our Sprague carrier to give maximum strength and durability. Meaning this SuperATV differential can endure ride after ride of hard differential lock engagements without failing—which also means, you won’t have to worry about getting a replacement anytime soon. These have been drastically improved the components prone to failure and wrapped them in a stronger case. Ensuring these have stronger mounting, the differential case is beefed up by using helical inserts in the mounting threads. These inserts make it pretty much impossible for the mounting bolts to wallow out or pull out over time. Also featuring additional material to the mounting locations. OEM has feet-like mounting locations, while ours mounts to a single block built into the body of the diff. Super ATV's Kit also has thickened pinion gear tubes to make sure it can stand up to every bump, jar, and torque load. Plus, we make it easy on you. We use a bolt-on cap to retain the pinion bearing instead of a snap ring. That means you can service your pinion gear without destroying your seal. You have the options between Billet or Cast Case. While Cast will still do the job, billet is denser, stronger, and less porous than cast, plus it looks really stinking good. If you’re a pedal down, no holds barred kind of rider that chews up stock differentials, you need a stronger billet diff. Upgrade your Polaris RZR with this Super ATV Complete Differential Kit today!! - Our Super ATV Tinted Roof generally ships out within 1 business day! - Fits: Polaris RZR XP Turbo : 2016+ Polaris RZR XP 4 Turbo : 2016+ Polaris RZR XP 1000 : 2014+ Polaris RZR XP 4 1000 : 2014+ Polaris RZR 1000 S : 2016-2020 Polaris RZR 1000 S4 : 2019-2020 Polaris RZR Trail 900 Sport : 2021+ Polaris RZR Trail 900 Premium : 2021+ Polaris RZR Trail 900 Ultimate : 2021+ Polaris RZR Trail S 900 Sport : 2021+ Polaris RZR Trail S 1000 Premium : 2021+ Polaris RZR Trail S 1000 Ultimate : 2021+ Polaris RZR 900 : 2015-2020 Polaris RZR S 900 : 2015-2020 Polaris RZR 900 XC : 2015-2017 Polaris RZR 4 900 : 2015-2018 Polaris RZR XP 900 : 2012-2014 Polaris RZR XP 4 900 : 2012-2014 Polaris RZR 800 : 2010-2014 Polaris RZR 800 S : 2010-2014 Polaris RZR 4 800 : 2010-2014 Polaris RZR 570 : 2012+ - Ships completely assembled and ready to install—just add oil - The only aftermarket complete Polaris differential - 3/8" thick pinion gear tube walls - Utilizes aircraft grade aluminum sprague carrier - Cast or billet aluminum case - Warranty Info: Super ATV Offers a Limited 18 - Month Warranty. Contact for further info. - Manufacturer's part# DIFF-1-001-K Installation Instructions