UMI Performance 64-72 GM A-Body 1in Solid CrMo Rear Sway BarOur beefy 1" solid rear sway bar is designed to reduce body roll, understeer and increase cornering capabilities resulting in a more balanced suspension. This rear sway bar also works to keep your vehicle level and straight during those hard launches. Our sway bar is manufactured from 1" solid 4140 CrMo steel, heat treated and formed as one piece to ensure maximum strength and performance. The hot forming and heat treating process allows the bar to