K-Factory TM E4 Steel/Alu CVDs
K-Factory has developed a new set of high strength universal joints for the Team Magic E4 series of electric touring cars to help cope with the extra power generated by extremely powerful brushless motors and high voltage LiPo batteries. The improved strength comes from the use of specially developed K-Factory ST-Steel and an increase in drive shaft thickness. The thicker and stronger UJ combines with a lightweight aluminum wheel adapter which helps reduce the overall weight and keeps the rotating mass of the E4 transmission as low as possible.
Source: K-Factory [kfactoryracing.com]