The part number for the Tiger axle bearings is 14130X. Although Sunbeam Specialties and Classic Sunbeam have these on order, it appears they may no longer be available. The Timken 14130 bearings are the ones the companies in the UK are selling, based on photos of the bearings, that show the part number. Timken's website states the bearings are not interchangeable. The14130X are supposed to be a sturdier bearing and I've been told the 14130 units are ok for street use, but not if you are going to be racing, serious autocrossing, etc. Has anyone used the 14130 bearings? If so how have they performed. I have a complete set of parts to add a limited slip and replace the 3.73 gears with 3.31, with the exception of the axle bearings.