Adjustable rear upper control arms for aluminum chassis C6 Z06 model only. Adjusts rear camber. Rear upper arms are made of Japanese DOM tube 1/8" wall. Hand TIG welded and reinforced with a laser cut and CNC brake bent plate. Clamping rod end receivers, and double thread adjusters. Forged rod ends with PTFE lined maintenance free, low torque spherical bearings. Compatible with OEM and aftermarket knuckles. Stock position is 10mm away from joint bottom out. Gain 1.6 negative degrees for a total of -2 when the rod end is bottomed out on the rod end receiver weld cap, or trim 6mm off the rod end for 1 more degree of camber totalling -3.