XRay 303363 T4 '15 1 degree to-in rear upright, left. hard.

Molded-composite left rear upright features built-in 1? of outboard toe-in to improve the rotation of the car in corners and prevent suspension geometry changes in serious crashes. Features two roll center positions on the top of the rear upright. Accommodates small but robust 5x10 ball-bearings for minimized unsprung weight.

Hard rigidity (labeled ?H?) specially optimized for foam-tire racing.

Use with matching right-side rear upright 303353.