Diff outdrives for XRAY Active Diff of self-developed, world-renowned HUDY Spring metal the absolute most challenging metal product available are CNC-machined on precision German long-turn devices. The diff outdrives are ground and strategically lightened to reduce rotating fat. The diff outdrives are then further hardened to make sure maximum power and longest lifespan. The diff outdrive shafts are additionally precision hand-ground to an incredibly high threshold to be sure an ultra-smooth tight easily squeeze to the diff body and diff gear. Group of 2.