CNC-machined 52mm ECS drive shaft made from world-renowned HUDY Spring Steel™. This race-quality drive shaft is a spare part for #305330 Equalized Corner Speed (ECS) Drive Shaft 52mm - HUDY Spring Steel™ (1), exclusively manufactured by HUDY. Drive shaft diff end has been strategically lightened to reduce rotating mass without compromising strength. The drive shaft is updated with a stronger 2mm pin for increased durability and reliability.