Xtreme Anti-roll Bar Kit, Rear, Solid 1.375", 3.25" AxlesHard launches from high horsepower cars at the drag strip require more than just a normal street style sway bar. BMR Suspensions Xtreme Anti Roll Bar for 1964 1972 GM A Body allows you to launch harder without excessive body roll limiting traction, with little sacrifice to youre a bodys street manners. Manufactured from 1. 375 inch solid bar stock, BMRs Xtreme Anti Roll Bar (XSB007) is designed to eliminate body roll and transfer as much power as