Designed for the difficult operating environment of the ATV/UTV industry, this bearing is a premium EMQ quality, hi-speed bearing.One kit per side required, two total required to change out front; two total required to change our rear.Features precision high speed bearings manufactured to ABEC3 standards.Each front kit repairs one wheel, purchase 2 kits to complete both wheels.This kit comes with wheel bearing only.This item fits the following applications:Polaris 325 Magnum 2x4 00-01Polaris 325 Magnum 4x4 00-01Polaris 325 Xpedition 00-01Polaris 425 Xpedition 00-01Polaris 500 Magnum 4x4 99-01