The TCS 2-piece billet input shaft is designed for higher HP engines and is made for performance Dodge diesel applications. Made from 300 maraging steel, this shaft is heat treated to withstand high stress and torsional loads. Shaft to hub splines have been increased to 35 spines for 25% more surface contact than the OE version. This shaft is precision ground at all critical diameters and is tested to 2,700 ft/lbs of torque. The TCS 2-piece billet input shaft comes with Goerend lube modifications.