The new 38T front side diff crown gear the XB8 is CNC-machined from hardened HUDY metal developed specially for gears, permitting ultra-true, vibration-free running. All sides are chamfered for smooth engagement. The "38" sign is laser-engraved for easy recognition, as well as the bearing size is ground for optimum accuracy. Making use of this gear in the front diff of one's XB8 alters the apparatus ratio from 3.333 (with 40T original gear) to 3.167. This will make the automobile more straightforward to drive, particularly in bumpy condition, and improves on-power security. The newest 38T front diff crown gear improves traction and reduces sliding.