The active center diff outdrives are CNC-machined on accuracy German long-turn machines and they are made of HUDY toughened steel. The diff outdrives are presented in addition ground and strategically lightened to lessen rotating weight. The diff outdrives are then further hardened to be sure maximum power and longest lifespan. The diff outdrive shafts come in addition accuracy hand-ground to an extremely high restriction to be sure an ultra-smooth tight easily squeeze into the diff human body and diff gear.