CNC-machined 50mm ECS drive shaft produced from world-renowned HUDY Spring Steel™. This race-quality drive shaft is one more component for #305331 Equalized Corner Speed (ECS) Drive Shaft 50mm - HUDY Spring metal™ (1), totally manufactured by HUDY. Drive shaft diff end was strategically lightened to attenuate rotating mass without compromising energy. The drive shaft is updated with a stronger 2mm pin for increased durability and reliability.