It's a good idea to get a master kit since you'd have the rear end taken apart already. The kit includes the bearings, shims, crush collars, seals, gasket, and ring gear bolts. It's a small price to pay for some added insurance. We stock Motive because I've had the best luck with them. Especially as a daily driver the performance gears are as quiet as OEM gears. I'm SURE there are some guys who don't like them. I'm yet to have any complaints on them which is why I switched to them.