This front 4x4 hub clutch is designed as a direct replacement for the factory Hilliard-style front hub clutch used on select Polaris Sportsman models. The assembly installs on splined front driveshafts and includes a machined aluminum clutch cage, steel inner splined hub, hardened rollers, and a new garter spring for proper engagement and retention. Manufactured to match original fit and functional specifications, this hub clutch installs in the factory location with no modifications required and is intended for service or replacement of worn or damaged front hub clutch components. This unit is for splined shaft applications only; models equipped with keyed shafts require a different version. Fitment 1996–2003 Polaris Sportsman 400 (4x4 and 6x6) 1996–2003 Polaris Sportsman 500 (4x4 and 6x6) Replaces Polaris part numbers: 1520214 1520281