The function of endlinks on a Subaru is to be the main point between the swaybar and the control arms. The Kartboy Drop links replace these stock flexible plastic endlinks. The Kartboy Rear Endlinks for the 2002-2007 WRX are solidly designed, CNC cut and hard anodized 6061-T6 aluminum with stiff urethane bushings for the proper amount of dynamic flex. Made in the USA.