All Balls Racing Front Differential Roller Sprague Kit Polaris These Roller Sprague Kits are designed with a superior build for durable, long-lasting service. Constructed of 7075 aluminum, the bearing cages outlive other aftermarket versions, including those made from 6061 aluminum and even original manufacturer plastic cages. The product is packaged with a helpful plastic sleeve to hold rollers in position, facilitating easy installation. Fitment: Does not fit 2014-16 RZR XP 1000 models with differential part# 1333112 Does not fit RZR 1000 60 2016-17 built after 11/1/16 Fits 50 and 55 versions only of RZR 900 2015-2017 Also fits 60 versions of RZR 900 2016-2017 Features: Upgraded 7075 aluminum bearing cage Greater longevity and increased strength over aftermarket 6061 aluminum alternatives Superior to plastic bearing cages used by OEMs Fully assembled with a plastic retainer sleeve holding the rollers together for easy installation Hard-coated aluminum bearing cage for strength and durability Replaces Polaris OEM Part Numbers 3235487, 3235625, 3235844, 3235917, 3236417