G2 master installation kits come complete with everything you need to properly set up your ring and pinion gear set. They include Timken bearings, ring gear bolts, shims to set pinion and carrier bearing preloads, pinion seal and pinion nut. Master Installation Kit Front Dana 30 G2 for Jeep Wrangler JK 2 and 4-door models,for use in Jeep JK Dana 30 front only,kits contain top-quality Timken bearings,Made in USA,non Rubicon models,