Coilover kit - BC Racing - 3 Way Adjustable - ZX Series - GR YarisBC Coilover Kit ZX Series for GR Yaris Designed specifically for racing and track use. The ZX series feature 3 way adjustable damping with 20 clicks of low speed compression, 12 clicks of high speed compression and 30 clicks of rebound adjustment. ZX Series features include an upright damper design, combined with ultra high viscosity index racing shock fluid mean the ZX Series can maintain outstanding performance on the track and in competition use