Every engineered item has a weak link. Making the weakest link stronger (in this case I believe consensus is, that I agree with is the DS Cap), which means the next link is now the issue, and so on. Does this billet cap make an 8.75 a more robust rear, yes, is it robust enough for you, don't know, at some higher power level will it fail, absolutely, have I made this two sided cap upgrade to all my steel 8.75'x, yes, would I do it again, yes.