Super-compact back upright made from COMPLEX super-tough, high-tech composite product features multiple set-up options for top & reduced roll facilities. Upper roll center is adjustable via camber linkage & shims up/down & in/out. Lower roll center is adjustable via eccentric inserts in 9 different positions up/down & in/out. The race-proven, 2-piece design permits fine-adjustment and increases durability and performance. Molded from COMPLEX composite this upright works for some track conditions, especially low- and medium-traction tracks. The upright fits on both left & right edges. Can be used because of the Is employed aided by the #325324, #325325 or #325326 drive shafts.