Yukon Bearing installation kits are perfect for shops & builders who have shims on the shelf and are looking to save cost over a Master Overhaul kit. This kit uses high quality bearings and races along with all high quality small parts. kit includes carrier bearings and racespinion bearings and racespinion sealcrush sleeve (if applicable)marking compound and brush. Yukon does extensive research for each application to make sure your kit will arrive with all the correct parts you need to install your pinion gear.. This kit fits applications with a 27 spline pinion.