Take your pick from 51346 and 53136, whichever is available. 51346 gives you a spare pair of disk springs.
Originally Posted by
terry.sc
They are exactly the same bearing. The difference is that 51346 includes the spring washers and spacer used for mounting it on an F103. The complete thrust bearing assembly on an F103 is mounted inside the wheel, you need a thrust bearing assembly for each pair of rear wheels, so the pack includes all the parts needed.