I have not found an actual thread on it, just a passing mention that the RRS uses the same control arms as the LR3 and has slightly stiffer bushing that *may* last longer. Question, they do physically look the same so has anyone installed front lower arms or rear upper from an RRS on an LR3? I already have my lowers, but I would easily sell em to my neighbor and get RRS if they are worth it. Any word on longevity?

For front end, I think these are the proper part numbers for lowers:
LR029304 right
LR029306 left

Just more curious than anything I guess. I have not ordered my rear upper arms yet. I suppose I can give em a try anyway, they are only $20 more per side for OEM.

 

...from buddies at the dealer are that the RRS bushings are stiffer but they also fail at about the same rate.