The active center diff outdrives are CNC-machined on precision German long-turn machines and are constructed from HUDY toughened steel. The diff outdrives are in addition ground and strategically lightened to reduce rotating weight. The diff outdrives are then further hardened to make sure maximum strength and longest lifespan. The diff outdrive shafts are in addition precision hand-ground to a really high threshold to ensure an ultra-smooth tight fit in the diff human anatomy and diff gear.