Originally Posted by PERRIN_Chris
The PERRIN XD endlinks will last a lot longer than the standard endlinks if you are driving on salted roads. We made those endlinks specifically for that!
The new poly endlinks will also work fine in the salt too, since they don't have any steel parts in the endlink that can rust and clunk.
Can you quantify "a lot longer?" How has this been tested? Help justify the extra $100 cost per set.