Molded-composite remaining rear upright features integral 1° of outboard toe-in to enhance the rotation for the automobile in corners and prevent suspension system geometry changes in serious crashes. Features two roll center roles on the top regarding the rear upright. Accommodates small but robust 5x10 ball-bearings for minimized unsprung weight.
Medium rigidity (labeled M) specifically optimized for rubber-tire race.
utilize with matching right-side rear upright 303351. Are additionally useful for foam tires.