Fits aluminum chassis Z06 model only. Adjusts rear camber. Rear upper arms are made of DOM tube 1/8" wall and reinforced with a laser cut and CNC brake bent plate. Tig welded and powdercoated. 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. This is the same arm we use in Formula Drift on Matt Field's Falken Tire C6. 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.