The stock ones are pretty tough nylon like material. They are probably pretty solid in compression and expansion so I doubt if the sway bar links alone will make a huge difference. I suspect it's the sway bar that is most of the improvement factor. They look nice though in various pretty colors.
I'm pretty sure that you wouldn't say
that after the
first time one of the OEM links failed on you, let alone after the
third one failed on you, which for me, occurred half thru a very tight turn I was taking at some speed, and it failed so suddenly and catastrophically (without any of the 'soggy, limp biscuit' feeling beforehand that warned of the impending failure of the first couple

) that it caused ... hang on, I'm sure I mentioned this before in this thread - yep, see post #2 above. (Yeah, I know, sometimes I'm a bit of a slow learner!

But once I do learn something...

)
These days, I'm more inclined to compare the OEM sway bar end links to '
cheese sticks' or '
over-cooked spaghetti' than anything else, and while I don't think replacing
just the end links alone will give you any real handling benefit, that's not only because they're akin to a soggy &/or limp biscuit, it's more because, as you suggest, the OEM Sway bar
also falls under the same '
cheese stick', '
over-cooked spaghetti', &/or '
soggy, limp biscuit' comparison/description thing, and changing the OEM Sway bar out/upgrading it can open up a whole new world of handling on your Spyder, just so long as you also swap out the end links!
