Recommended for use on carpet and songs with a top traction, the car rotates better and drives better through corners. Fits both XB4 & XB4 2WD. Aluminum straight back reduced suspension system system holders with included Suspension Settings (I.S.S.) permits quick & easy suspension system system system geometry environment. This XRAY concept was introduced toward first XB8 and today finished up being carried to your 1/10 scale XB4. Utilizing eccentric suspension bushings put into aluminum suspension system system obstructs, and additional suspension system shims, the XB4 suspension system system system geometry might be completely modified.