New XB4’20 XRAY ECS Front Drive Shaft 83mm with 2.5mm Pin - Spring Steel • Decreases vibration • Improves stability • Increases steering • Improves cornering speed • Improves landing after jumps • Improves traction on rear suspension • Easier to drive • Reliable • Durable • 2.5mm pin • HUDY SPRING STEEL XRAY ECS Drive Shaft in length 83mm with 2.5mm pin. The XRAY’s unique ECS Drive Shaft equalizes the speed between the drive shaft and the wheel. With a unique 2-piece joint between the axle and the wheel, the same extreme wheel turning angle is divided into two shallower angles without joint binding. This means that at the same cornering speed, the inner wheel will not bind or vibrate. Drive through the corner is more stable, more precise, and easier to drive. The ECS Drive Shafts help also with improved landing after jumps. With the ECS drive shafts, wheel vibrations and noise are decreased to minimum, steering is increased, stability of the car is increased and cornering speed and smoothness are noticeably increased as well. A must have option part. Fits only XB4’20 #365202 ECS Front Drive Shaft 83mm with 2.5mm Pin - Spring Steel