Suitable for usage on carpeting and tracks with a premier traction, the car rotates better and drives better through corners. Fits both XB4 & XB4 2WD. Aluminum right back reduced suspension system system system holders with included Suspension SettingsĀ (I.S.S.) permits fast & easy suspension system system system system system geometry environment. This XRAY concept had been introduced toward very first XB8 and after this completed up being carried to your 1/10 scale XB4. Utilizing eccentric suspension system system bushings placed into aluminum suspension system system system obstructs, and extra suspension system system shims, the XB4 suspension system system system system geometry are totally modified.