Blox Racing Rear Sway Bar (24mm) - 15-21 Subaru WRX/STI - BXSS-10120-RBlox Racing sway bars are designed and manufactured to greatly improve the vehicles handling, reduce body roll, as well as, increase the vehicles lateral stiffness. Each sway bar is made from 55Cr3 Chromium steel and feature precision forged ends and exclusive polyurethane bushings that eliminate squeaks and the need for lubrication. Sway bars are subject to vigorous stress and fatigue testing and 72 hours of corrision salt spraying. The sway bar, in