The Endlink's job on a Subaru is to transfer the rigidity of the sway bar to the lateral links in the rear and the control arms in the front. The Kartboy Drop links replace these stock flexible plastic endlinks. They are solidly designed, CNC cut and hard anodized 6061-T6 aluminum with stiff urethane bushings for the proper amount of dynamic flex. Hand Made in USA. 100% Guaranteed.