CNC-machined aluminum front surprise human anatomy for XB8 Zero Rebound Shocks, made from premium lightweight 7075 T6 aluminum. The special design regarding the shock human anatomy and top cap allows installing a ribbed shock membrane at the top of the surprise body as opposed to conventional installation into the top limit. The installation of the ribbed membrane layer in the surprise human body permits extra oil to leak down, and alongside a shock limit vent hole and adjusting screw allows the adjustment associated with number of atmosphere (rebound) until the desired zero rebound is accomplished. The oversized big-bore shocks feature 18.5mm O.D. shock systems, externally threaded with an adjustable collar for fast & easy springtime preload modification. The surprise bodies are coated in a titanium color. Pair of 2.