G2 Master kits include all the parts that are needed to properly install a ring and pinion. These G2 kits include hard to find parts like a proper shim kit, replacement pinion nut , crush sleeve, pinion seal, pinion bearings, carrier bearings, ring gear bolts, silicone sealer, locktite and gear marking compound. these are the parts that the auto parts store never seems to have or ever herd of.Details:Pinion NutPinion SealTimken Outer Pinion Bearing And RaceTimken Inner Pinion Bearing And RacePinion ShimsCarrier ShimsCarrier Bearings And RacesRing Gear BoltsThread Locking CompoundGear Marking CompoundSilicone Sealer