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. Specs: Designed to deliver trouble-free, consistent performance ,Made from high-quality materials for ultimate durability ,kits contain top-quality Timken bearings,Made in USA, Notes:Fits also TJ Unlimited ,For Dana 30 ,