Attention Drag Racers, Mud Boggers and Extreme Off-Roaders. This One’s For YOU! Heavy Duty Input Shaft and Forward Drum. The TCS Shaft is made from 300 Maraging steel. The spline area has been increased in size by 15% to provide greater drum / shaft contact and more strength. This is a 100% bolt-in assembly. This O.E. drum has been refurbished to almost better than new condition.