The brand new 38T front part diff crown gear the XB8 is CNC-machined from hardened HUDY steel developed especially for gears, permitting ultra-true, vibration-free running. All sides are chamfered for smooth engagement. The "38" indication is laser-engraved for effortless recognition, along with the bearing size is ground for maximum precision. Making use of this gear in the front diff of the XB8 alters the apparatus ratio from 3.333 (with 40T original gear) to 3.167. This will make the car better to drive, particularly in bumpy condition, and improves on-power safety. The modern 38T front side diff crown gear improves traction and reduces sliding.