Appropriate use on carpeting and tracks with a higher traction, the car rotates better and drives better through corners. Fits both XB4 & XB4 2WD. Aluminum backside paid suspension system system system holders with integral suspension system Settings (I.S.S.) enables fast & easy suspension system system system system geometry environment. This XRAY concept finished up being introduced to the very first XB8 now could be carried around the 1/10 scale XB4. Using eccentric suspension system bushings put in aluminum suspension system system obstructs, alongside extra suspension system system shims, the XB4 suspension geometry is wholly modified.